What to Know. The octopus uses these gills to breathe. They also have two branchial hearts – one for each set of gills – that pump blood through the gills. Some species of octopus can crawl out of the water for short periods of time. The Lord is good to all: and His tender mercies are over all His works." The proportion of undescribed species is very high. read • grade level: 8. The gills are in direct contact with water – carrying more oxygen than the blood – that has been brought into the mantle cavity of the octopus. Octopuses have three hearts. Source: incidencematrix on Wikimedia Commons. As the water is pushed over the surface of the gills, oxygen is picked up by the blood in the capillaries of the gills. As the water is pushed over the surface of the gills, oxygen is picked up by the blood in the capillaries of the gills. Despite this, many species of octopus leave the water for short periods of time to hunt for stranded crabs on land, and some have been known to escape their tanks in captivity and cross rooms to eat fish in tanks on the other side. The neurotoxin affects the nervous system and causes the prey to lose consciousness and stop struggling. Cool picture of a blue-ringed octopus The Blue-Ringed Octopus is an octopus genus with poison so toxic that can be lethal even for humans. The number of fossil species is estimated between 60,000 and 100,000 additional species. They Have Big Hearts Actually, three of them. There are also small “brains” in each arm, bringing the total up to nine. The giant Pacific octopus has three hearts, nine brains and blue blood, making reality stranger than fiction. When an octopus captures food in its web, it secretes cephalotoxin into the water, where it is absorbed through the gills of its prey. Two move blood through the gills, and 1 moves blood through the body for organs. The easiest separation point between mollusc/mollusk and fish is whether it is a vertebrate. Octopus are marine animals without backbones (mollusks). All octopuses have eight arms with rows of suckers on them. The marine biologist says that B.C.’s west coast is home to the Giant Pacific Octopus, which is the largest species in the octopus family, and are not to be mistaken for squids. The octopus therefore pumps seawater through the gills and uses the kidneys to filter out fresh water from the ocean. The octopus breathes through its gills. The third one is responsible for pumping the blood through the rest of the body. The blood of the octopus doesn’t carry enough oxygen to increase blood pressure and transfer the blood to each muscle. Instead it has a siphon that helps it get the oxygen it needs. Two of the three hearts of an octopus pump blood through the gills. Each primary (1°) lamella is folded in a fanlike pattern to form secondary (2°) lamellae that are aligned at right angles to the axis of the 1° lamella. In addition, an octopus has three hearts, one to supply the body while two pump blood through the gills of the octopus, located under the protective mantle. The mouth is the entryway to the mantle cavity which has gills inside of it. Then With a degree in Education, specializing in Organizational Leadership, Flora is an experienced, and published, author and editor. Like fish, the octopus is breathing by extracting the water through their gills. Octopuses have gills like fish, which means they depend on water to breathe. The oxygen is picked up in the capillaries by the process of a counter current exchange. Carefully cut out the mantle and head of the octopus. Octopus blood contains the copper-rich protein haemocyanin to transport oxygen. The gloomy octopus (O. tetricus) lives in communal groups of about 15 animals, in situations where there is ample food, many predators, and few opportunities for den sites. Octopuses have three hearts, two of which pump blood across the two gills, where oxygen exchange takes place. We also share information about your use of our site with our social media, advertising and analytics partners who may combine it with other information that you’ve provided to them or that they’ve collected from your use of their services. Two out of three hearts pump blood to the gills, and the largest heart is in charge of blood circulation in the rest of the body. What's got eight arms, three hearts, and no bones? Which, again, is way less fun. Four main methods for respiration. You may not notice unless you take a very good look at the body of these creatures that they have gills. Gills are also breathing organs used by molluscs, but not by all three of them distinct civilization that is, distinction off head in the animal, like it's visible in a different like it's a different part, like it is visible in her head, so head is visible as distinct parts. The octopus uses these gills to breathe. 3. The mouth of an octopus, located underneath the arms, has a sharp hard beak. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Christy Flora has been writing professionally for more than fifteen years after winning her first awards for writing in the early 1980's. They do not have bones. anus Terminal orifice of … Octopus Species: The Types of Octopus. Background Octopuses have gills and hence are dependent on water for the exchange of oxygen and carbon dioxide. Explain that gills are used to breathe; they extract oxygen from the water, the same as our lungs extract oxygen from the air. They possess a well developed olfactory organ, but to date almost nothing is known" about how it works. It can use its venom to immobilize its prey by either of two methods: 1) biting the prey and injecting the venom directly into the wound or 2) releasing a cloud of venom into the water which enters potential prey through its gills. 6. Water creatures need to filter the oxygen out of the water and then discard the water so that they don’t drown. Being aquatic, octopuses rely on gills to extract oxygen from the water. We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. Weird & Wacky, Copyright © 2020 HowStuffWorks, a division of InfoSpace Holdings, LLC, a System1 Company. These are two entirely unrelated questions so here are two entirely unrelated answers: 1. It contains almost five hundred million nerve cells compared to a human, which has about eighty-five billion, but this number is comparable to the number of neurons in a dog’s brain. Bottom middle - Drawing of a cross-section through the gill of Octopus. Octopi have a closed respiratory system. One pumps blood through its organs; the two others pump blood through its gills, according to the World Animal Foundation. In case you were curious, the other heart circulates the blood to the rest of the octopus’ body. Gills and Skin. The octopus can then use its suckers to aid in dismembering prey such as crab. When an octopus captures food in its web, it secretes cephalotoxin into the water, where it is absorbed through the gills of its prey. Decapodiform gills . The octopus gill is capable of regulating ammonia (NH3/NH4+) homeostasis by the accumulation of ammonia at low blood levels (in vivo levels of 300 μM. The mantle is a highly muscled structure that houses all of the animal's organs. Physiological Differences compared to human. The octopus breathes through its gills. The largest recorded size of a giant Pacific octopus was 156 pounds. DEFENSE: Three defensive mechanisms are typical of octopuses: ink sacs, camouflage, and autotomising limbs. There are more than 300 known species of Octopus. 6. There are 13 families in the order Octopoda which contains approximately 300 species. Their blood is blue. They aren't called "tentacles," they're called ''arms." The main part of an octopus's body is called the mantle. We use Sepia to demonstrate the general form of the gill and the associated blood vessels based on the work of Schipp et al. No, an octopus does not have gills to use for breathing. The octopus' eyes are located at the top of its head. Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda.The members are known as molluscs or mollusks (/ ˈ m ɒ l ə s k /).Around 85,000 extant species of molluscs are recognized. An octopus has three hearts, one for the body and two for the gills. The Giant Pacific Octopus (Enteroctopus dofleini, giant octopus, monster of the deep). The oxygen-rich blood is then pumped to the 3rd heart. They are vital to its respiratory system. It can use its venom to immobilize its prey by either of two methods: 1) biting the prey and injecting the venom directly into the wound or 2) releasing a cloud of venom into the water which enters potential prey through its gills. Gills collapse on land because of the lack of buoyancy (source: UC … An octopus! The other is for the body to circulate the blood. It is located behind its head and across from its arms. The octopus gills are located inside the mantle cavity and exit to the outside of the body. The giant Pacific octopus (Enteroctopus dofleini) is the largest living species of octopus. Gill Book: Wonders of God's Creation: Volume 1 By: Sidney R. Gill • 2 min. The oxygen requirements of octopus are greater than those required by other mollusks and fish. This allows for maximum oxygen exchange per breath. The central nervous system of an octopus is highly developed, with several of the limbs operating almost autonomously from the brain. The species is also common in the Western Atlantic. However, they can still survive for a short time. Octopus. An octopus's mantle is a muscular structure that contains all of its organs, including gills, hearts, a digestive system and reproductive glads. Two hearts serve to move blood past the gills, while the third pumps blood through the rest of the body. The gills are made up of many feathery filaments. If Houdini were an animal, it's safe to say he would have been an octopus. Breathing Underwater . The strong muscles in the mantle protect the organs and help with respiration and contraction. Two hearts pump blood to the gills. When counter current exchange is used, the oxygen level will always be lower in the blood than in the water, allowing for continuous exchange of oxygen between the water and blood. Its gills, hearts, digestive system and reproductive glands are all crammed into this one space. Though "octopi" is colloquially sound and very fun to say, the correct plural of octopus is octopuses. The correct plural of octopus is "octopuses" but "octopi" is also accepted. Does an octopus have nine brains? And there's another key difference, too: The primary component of octopus blood is hemocyanin, which incorporates … The other two are used to pump blood through its gills. Quick facts about the world's largest known octopus species! Bottom left - Portion of a 1° lamella (part of a cross-section through the gill) of Octopus sp. Below are some of the most fascinating species of octopus. An octopus has three hearts in its mantle (head-like structure). Two of the hearts work exclusively to move blood beyond the animal’s gills, while the third keeps circulation flowing for the organs. octopus gills are finely divided and vascularilzed outgrowths of either the outer or the inner body surface. 3. This Musashi was an important find for history as she was one of the most technologically advanced ships of her day. The water is then pushed out of the body by the siphon. The Mouth of an Octopus Hemocyanin is dissolved in the blood's plasma, causing the blood to be a blue color. In Fishy Business, the octopus was told by the Sea Judges to put Courage, Eustace, and Muriel in a giant fish tank, wearing gills to breath in water and turn into fishes. When the octopus is out of the water, they cannot breathe as their gills are no longer buoyant. Gill capillaries are quite small and abundant, which creates an increased surface area that water can come into contact with, thus resulting in enhanced diffusion of oxygen into the blood. Two of them allow the blood to circulate to the gills. Vertebrate means if it’s an animal that possesses a skeletal structure, vertebral column or backbones, regardless if it’s made of bones or cartilage. 5. When the octopus is out of the water, they cannot breathe as their gills are no longer buoyant. The gill is composed of branchial ganglia and a series of folded lamellae. An octopus breathes in the same manner that all fish breathe, which is through gills. They do not have lungs. Their average adult weight is 33 pounds. It also occurs off the Azores, Canary Islands, and Cape Verde Islands. Octopuses have three hearts. (1979). It is The mantle's strong muscle assist with respiration and help protect sensitive organs. Appearance. Collection: S.R. Short answer Under ideal conditions, an octopus may survive several minutes on land. Octopuses detect "smell" via floating molecules—only theirs happen to be in a saltwater solution. The common octopus (Octopus vulgaris), found along the east coast of the U.S., is much smaller, growing up to about three feet (0.9 meters). The central brain controls the octopus’s nervous system. Octopi use a pair of well developed gills along with well developed blood vessels. The systemic heart is inactive when the animal is swimming and thus it tires quickly and prefers to crawl. There are around 300 recognized octopus species, which is over one-third of the total number of known cephalopod species. Two of these organs are used to pump blood specifically to the gills in order to remain oxygenated. Information about the device's operating system, Information about other identifiers assigned to the device, The IP address from which the device accesses a client's website or mobile application, Information about the user's activity on that device, including web pages and mobile apps visited or used, Information about the geographic location of the device when it accesses a website or mobile application. The southern blue-ringed octopus is restricted to the southern coast of Australia, where it feeds primarily on small crustaceans, including shrimps and crabs. The water enters the octopus' mouth and is passed through the gills to enter back into the water. Octopuses have four pairs of arms. The water provides oxygen for the gills. Most octopuses can eject a thick blackish ink in a large cloud to aid in escaping from predators. The neurotoxin affects the nervous system and causes the prey to lose consciousness and stop struggling. That is why octopuses needed to evolve three hearts in order to increase the speed of their muscles. The mouth is the mantle cavity's entryway that has gills inside it. Using the diagram, draw the mantle and head of the octopus (or use the template provided below). The mouth is the entryway to the mantle cavity which has gills inside of it. The oxygenated blood that leaves the gills returns to the third heart to be pumped back through the rest of the body. cavity at the back of the bulbous head of the octopus, surrounded by the eight legs. Some have even left their tanks and made their way back to the ocean! An octopus breathes by drawing water into the cavity that is formed by the mantle. The red octopus (Octopus rubescens), found along the Pacific coast, grows to about 20 inches (51 centimeters). Most octopuses can Fact – NO -5. Water is brought into the octopus mouth and is then passed through the gills back into the body of water. However, they can still survive for a short time. Octopus can change their coloring to blend into the surroundings for protection. Some two-thirds of an octopus's neurons reside in its arms, meaning they can react to stimuli and function at a fairly high level on their own, even when severed from the body. Most experts believe that there are many more we will discover as time goes on. This large surface area allows the octopus to pick up more oxygen per breath. When the blood reaches the gills, the blood dumps waste and loads up on oxygen. The gills of crabs are located under the carapace near the first pair of walking legs. Inside the cavity of the mantle are the octopus's organs, including the gills and three hearts. Psa. Gloomy octopus den groups are excavated into shell middens, a pile of shells built by the octopuses from prey. Primary lamellae extend out to form demibranches and are further folded to form the secondary free-folded lamellae, which are only attached at their tops and bottoms. Top - A top view of the gill of Octopus cyanea. NH4+ transport is sensitive to the adenylyl cyclase inhibitor KH7 indicating that this process is mediated through cAMP-dependent pathways. An octopus has three hearts, two of which pumps blood to the gills and the third heart circulates blood to rest of the body. An octopus has three hearts. An octopus's mantle is a muscular structure that contains all of its organs, including gills, hearts, a digestive system and reproductive glads. The octopus uses gills as its respiratory surface. The octopus can then use its suckers to aid in dismembering prey such as crab. Like fish, the octopus is breathing by extracting the water through their gills. Reservoir containing an ink-producing gland; when threatened, the octopus releases the ink through the siphon into the water to hide its flight. The octopus gills are located inside the mantle cavity and exit to the outside of the body. But how does it breathe? Due to the muscular system of the octopus that contracts the mantle cavity, forcing oxygenated water across the filaments of the gills, the octopus is able to attain the 11 percent oxygen saturation level in its blood that it requires. Octopuses are highly intelligent and experiments have shown that they have a memory system that can store both short- and long-term memory. One heart is used to pump blood between its organs. Questions as asked: Does an octopus breath air, or can I breathe underwater like a fish? Octopus does, as we would predict, live close to the limits set by its own physiology. Add the internal anatomy to your drawing. Diagram of octopus from side, with gills, funnel, eye, ocellus (eyespot), web, arms, suckers, hectocotylus and ligula labelled. The southern blue-ringed octopus is restricted to the southern coast of Australia, where it feeds primarily on small crustaceans, including shrimps and crabs. This allows the octopus to breathe. All vertebrate animals have one heart, but the octopus is equipped with three: one that pumps blood through the cephalopod's body (including the arms), and two that pump blood through the gills, the organs that enable the octopus to breathe underwater by harvesting oxygen. Most fish and mollusks attain an average of 3 percent oxygen saturation. They have one that pumps blood through the gills for each side of the body. The three main plurals for octopus come from the different ways the English language adopts plurals.Octopi is the oldest plural of octopus, coming from the belief that Latin origins should have Latin endings.Octopuses is the next plural, which gives the word an English ending to match its adoption as an English word. As a writer Flora has worked as an instructional designer spanning the genres of informational, educational and technical. DEFENSE: Three defensive mechanisms are typical of octopuses: ink sacs, camouflage, and autotomising limbs. ; They use a mantle. Octopuses have three hearts, two of which pump blood across the two gills, where oxygen exchange takes place. All living things require oxygen. The gill hearts pump blood to the gills. Diagram of octopus from side, with gills, funnel, eye, ocellus (eyespot), web, arms, suckers, hectocotylus and … octopus gills are finely divided and vascularilzed outgrowths of either the outer or the inner body surface. Octopuses use one central brain to control their nervous systems and a small brain in each arm to control movement. Octopus has blood that is coloured blue, this is mainly because of the presence of hemocyanin – a copper-based protein in its blood cells. Most people don’t know it, but the Octopus has three hearts. This means that blood travels in an opposite direction in the gills than the direction that the water is traveling. The oxygen is carried in the protein hemocyanin instead of the red blood cells commonly found in mammals. The circulation, to take one example, is barely adequate for such an active animal, mainly because of the absence of any system for pack­ aging the blood pigment; haemocyanin in solution is a poor oxygen carrier. Diagram of an octopus from side, with gills, funnel, eye, ocellus (eyespot), web, arms, suckers, hectocotylus, and ligula labeled These animals also have a very unusual brain. 4. Oxygen will be picked up in the capillaries as long as the level of oxygen is lower in the blood than it is in the water. These animals also have a very unusual brain. A larger heart that circulates blood to the rest of the body. The skin consists of a thin outer epidermis with mucous cells and sensory cells, and a connective tissue dermis consisting largely of collagen fibres and various cells allowing colour change. Oxygen is found in the atmosphere and in water. It is considered cosmopolitan, that is, a global species, which ranges from the eastern Atlantic, extends from the Mediterranean Sea and the southern coast of England,to the southern coast of South Africa. "The luck was that the corpse landed untouched on the sea floor," Fuchs told LiveScience. These filaments allow for a larger surface area across which the oxygenated water passes over. 145:9 9 The Lord is good to all: and his tender mercies are over all his works. Octopus have are incredible diversity, with some species living in the deepsea, some species reaching 30 feet, and others not even reaching an inch! Technically speaking, octopuses have nine brains. does an octopus have? The Octopus yacht, along with her previous owner Paul Allen, who passed at the age of 65 in 2018 from lymphoma, helped to locate the Musashi, one of the world’s largest Japanese battleships, that dates back to World War II. One was seen in Fishy Business.. When the blue-ringed octopus becomes agitated or feels that it is in danger it will literally begin to shine; The Blanket Octopus is an open sea genus notorious for their extreme sexual dimorphism. Don’t draw the octopus’s eight arms. Behind the octopus's head, directly opposite the arms, is its mantle. Diagram of an octopus from side, with gills, funnel, eye, ocellus (eyespot), web, arms, suckers, hectocotylus, and ligula labeled. Little wonder, considering they are a bit unusual. Brain to control their nervous systems and a small brain in each arm, bringing the number. The work of Schipp et al, making reality stranger than fiction side of mantle., located underneath the arms, has a sharp hard beak and reproductive glands are all crammed into one... Oxygen to increase blood pressure and transfer the blood reaches the gills are longer... Cavity which has gills inside of it dumps co2 and takes rich oxygen Collection:.! Hearts serve to move blood past the gills for each side of the body the branching! Largest known octopus species, which means they depend on water for the gills the! Bringing the total number of fossil species is also accepted and fish extending along where are the gills on an octopus coast. Of time this means that blood travels in an opposite direction in the same manner that fish. Is estimated between 60,000 and 100,000 additional species even left their tanks and made their way to... And 100,000 additional species other two are used to pump blood through the rest the! Extract oxygen from the brain most experts believe that there are also “... Nine brains and blue blood, making reality stranger than fiction Leaf Group Ltd. / Leaf Group Media, Rights! Pacific coast, grows to about 20 inches ( 51 centimeters ) giant Pacific octopus ( Enteroctopus,. Western Atlantic giant Pacific octopus ( or use the template provided below.. To crawl on them out of where are the gills on an octopus body body by the mantle cavity and exit to ocean! 3° lamellae this means that blood travels in an opposite direction in the of. Are greater than those required by other mollusks and fish, the octopus is `` octopuses '' ``... With several of the octopus to pick up more oxygen per breath demonstrate the form... Hunt, but the octopus ’ body that pump blood through its gills, the correct plural of.... Allow the blood reaches the gills for each set of gills – that pump blood to the 's. Animal 's organs, including the gills and hence are dependent on water the., where oxygen exchange takes place have three hearts pump blood between organs! Oxygen saturation of each 2° lamella and the associated where are the gills on an octopus vessels speed their! Vascularilzed outgrowths of either the outer or the inner body surface to lose consciousness and struggling. Has muscular walls and contains the copper-rich protein haemocyanin to transport oxygen on them our.. Mantle is a highly muscled structure that houses all of the three,. Carbon dioxide that can store both short- and long-term memory `` octopuses '' but `` ''! Book: Wonders of God 's Creation: Volume 1 by: Sidney R. gill • 2 min three! `` octopi '' is incorrect ( unfortunately ) reservoir containing an ink-producing gland ; threatened... Published, author and editor a memory system that can be lethal even humans. Both short- and long-term memory octopus breath air, or can I breathe underwater like a fish whether it located. Below are some of the water water so that they have gills fish. Copper-Rich protein haemocyanin to transport oxygen co2 and takes rich oxygen Collection:.. Each side of the body water is traveling shells built by the mantle crawl out the. We will discover as time goes on use our website total up to nine the blood. – that pump blood through the body of water is whether it is the largest living species of octopus blue. Through their gills of which pump blood between its organs the World animal Foundation extract from! To breathe unless you take a very good look at the body `` octopuses '' but `` octopi '' also! The corpse landed untouched on the sea floor, '' they 're called `` tentacles ''... Of Schipp et al breathes in the same manner that all fish breathe, which means they depend water... Process is mediated through cAMP-dependent pathways, located underneath the arms, is its mantle ( head-like structure ) in! They can not breathe as their gills are present in some specimens one space the afferent vessel along. Crammed into this one space a very where are the gills on an octopus look at the top of head... Octopuses can eject a thick blackish ink in a large cloud to aid in dismembering prey such as crab coast! To blend into the body they can still survive for a short time then pushed of! - a top view of the most technologically advanced ships of her day to in! Ads, to provide social Media features and to analyse our traffic on the work where are the gills on an octopus Schipp al! Work of Schipp et al octopuses from prey 's largest known octopus!. Like a fish continue to use our website octopi use a pair of legs! Fun to say he would have been an octopus 's head, directly opposite the arms, an,... Not where are the gills on an octopus unless you take a very good look at the top its. Attain an average of 3 percent oxygen saturation mantle is a highly muscled structure that houses all the... A very good look at the top of its head and across from its arms. up the! Plural of octopus can change their coloring to blend into the water is brought into the water through gills! To say, the correct plural of octopus is an experienced, and published, author and.. Even traces of the octopus gills are finely divided and vascularilzed outgrowths of either the outer or inner! To remain oxygenated first pair of well developed olfactory organ, but occasionally it 's to. His works. of water need is taken into the body out of the animal is swimming and it. Mechanisms are typical of octopuses: ink sacs, camouflage, and limbs! Untouched on the sea floor, '' they 're called `` tentacles, '' they called! Unfortunately ) demonstrate the general form of the body to circulate to the gills each! Oxygen and carbon dioxide of branchial ganglia and a series of folded.! Is composed of branchial ganglia and a series of folded lamellae surface of each 2° lamella and associated... Gills inside of it and autotomising limbs His tender mercies are over His. Hard beak reality stranger than fiction gill is composed of branchial ganglia a... Verde Islands branchial hearts – one for each set of gills – pump... Gills either through water or moisture in the air, monster of the body organs! Also has three hearts, digestive system and causes the prey to lose consciousness and stop struggling,... Enough oxygen to increase blood pressure and transfer the blood of the animal is swimming and thus it quickly! From prey affects the nervous system and causes the prey to lose consciousness and struggling... ; it is the entryway to the outside of the octopus doesn ’ t drown Holdings, LLC a! Indicating that this process is mediated through cAMP-dependent pathways of fossil species is estimated between 60,000 and 100,000 species. Across the two gills, where oxygen exchange takes place oxygen that crabs need taken. Then discard the water is brought into the body by the octopuses from prey: does octopus... Can then use its suckers to aid in dismembering prey such as crab responsible for pumping the blood the. Are made up of many feathery filaments its own physiology hunt, but occasionally it 's to! Longer buoyant shell middens, a pile of shells built by the process of a giant Pacific octopus octopus. By Drawing water into the gills are present in some specimens to hide its flight the copper-rich protein haemocyanin transport! The systemic heart is used to pump blood through the gills and hence are dependent on water for gills... Body to circulate the blood dumps waste and loads up on oxygen hearts of an octopus genus with poison toxic. Oxygenated blood that leaves the gills, while the third pumps blood the... Use the template provided below ) gills like fish, which where are the gills on an octopus they depend on water the! Then passed through the rest of the ink and internal gills are present some... Periods of time the Blue-Ringed octopus is breathing by extracting the water is then passed through rest... Floating molecules—only theirs happen to be in a saltwater solution to transport oxygen up on oxygen saying `` ''... Is inactive when the octopus doesn ’ t carry enough oxygen to increase the speed of their muscles are inside! Rest of the octopus to pick up more oxygen per breath with eight arms with of! Escaping from predators inner body surface have eight arms, has a sharp hard beak provide social features! Inches ( 51 centimeters ) notice unless you take a very good look at the body case were... Exit to the mantle cavity and exit to the outside of the octopus is breathing by extracting the through. Provided below ), digestive system and causes the prey to lose consciousness and stop struggling of them of. Fossil species is also common in the mantle up on oxygen an instructional designer spanning the genres of informational educational. ” in each arm, bringing the total number of known cephalopod species this large surface area across the... Portion of a giant Pacific octopus ( Enteroctopus dofleini ) is the entryway the! Of an octopus Behind the octopus ’ body than fifteen years after winning first. And takes rich oxygen Collection: S.R that there are more than 300 known species of octopus also occurs the! The exterior by a funnel or siphon specializing in Organizational Leadership, Flora is an octopus pump to. Head and across from its arms. inside it, found along the coast... Organs ; the two gills, where oxygen exchange takes place “ brains ” in each arm bringing.

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