An octopus begins it's digestion by breaking it's preys shell with it's beak or tentacles. An octopus uses four main methods for respiration they are well-developed gills with well-developed blood vessels. All octopuses have eight arms with rows of suckers on them. After that, the food enters the buccal mass where the food is grinded by the radula.

They do not have bones. The pattern of the stomach varies according to the mollusks diet. Humans blood contains the protein hemoglobin, which helps it absorb oxygen and causes its red color. This makes the blood very viscous and it requires considerable pressure to pump it round the body; octopuses’ blood pressures can exceed 75 mmHg. Since the oxygen has to pass the water and go into the blood.

The blood in open circulatory systems is actually a combination of blood and interstitial fluid called hemolymph. Octopus Digestive System Process Octopus and Human Digestive system Differences The octopus has a siphon which is different to a human because a human drinks water from there mouths but an octopus has a different entrance for water. Octopus, in general, any eight-armed cephalopod mollusk of the order Octopoda. Cutaneous respiration in Octopus 2479 entirely to the change in PO•, since fresh skin samples starting at low O•Pvalues consumed oxygen at the same rate as samples at similar PO•values that had already been in the respirometer for 60–90min.

Squid's respiration process is similar to the octopus'. Besides having three hearts, the octopus circulatory system differs from the human system in one other way. Bivalve - Bivalve - The respiratory system: In the primitive bivalves the paired gills are small and located posteriorly. Find out from intrepid cephalopod aquarist Candace about the general body plan of a giant Pacific octopus and what provides the cephalopower to all that inkredible octopus behavior. Octopi use a pair of well developed gills along with well developed blood vessels. The main part of an octopus's body is called the mantle. It then takes a bite out of the meat. The octopus is excellent at spotting prey and reaching to just the right spot to snag it. Its eyes, for example, are similar to ours and possess an iris, pupil, lens and retina.

An octopus's mantle is a muscular structure that contains all of its organs, including gills, hearts, a digestive system and reproductive glads. Inside the cavity of the mantle are the octopus's organs, including the gills and three hearts.

Inside the cavity of the mantle are the octopus's organs, including the gills and three hearts. An octopus breathes in the same manner that all fish breathe, which is through gills.
Mollusca is a phylum of species that range from the cuttlefish to the sea snail. The mantle which is an organ found in the mollusks, the epidermis is the outer layer of the skin and lastly the siphon which pumps water in the gill system to enable the octopus to breath. The octopus uses tentacles to suck off shells In this type of circulatory system, heart or capillaries which are found in humans are only seen in some species. They have a closed respiratory system. Octopi have a closed respiratory system. The skin of Octopus vulgaris consumes considerable quantities of oxygen in vitro, averaging 4.55x10(-5)±1.80x10(-5) ml mm-2 h-1 (mean ± s.d. They are vital to its respiratory system.
Octopus is an animal that is deaf. Octopus blood contains the copper-rich protein haemocyanin to transport oxygen. The octopus has a closed circulatory system unlike other mollusks. Snail. The main part of an octopus's body is called the mantle. Physiological Differences compared to human. Four main methods for respiration. The water provides oxygen for the gills. Octopus. They are vital to its respiratory system. Oyster. Thirty-two experiments were then made with skin from They do not have bones. Learn more about the anatomy, behavior, and reproduction of octopuses in this article. The oxygen requirements of octopus are greater than those required by other mollusks and fish. As you might expect based on its skills in camouflage and avoiding predators, the octopus possesses a well-developed nervous system as well as complex sensory organs. The core of the cephalopod circulatory system is a series of three beating hearts. They are vital to its respiratory system. An extremely talented mimic, this particular species can imitate sole fish, lionfish and sea snakes with staggering accuracy. Its eyes, for example, are similar to ours and possess an iris, pupil, lens and retina. The octopus's immune system—what it has of one—relies on innate capabilities alone, limiting its attacks to things that product the signatures of infection. These vessels allow blood to be pumped to specific areas of the octopus rather than bathing their all their internal organs like the mussel and snail do. The gills in all other bivalves (save septibranchs, which have lost their gills) are greatly enlarged and possess a huge surface area. They do not have bones.

They have gills because they live underwater. The mantle which is an organ found in the mollusks, the epidermis is the outer layer of the skin and lastly the siphon which pumps water in the gill system to enable the octopus to breath. ; They use a mantle.

What is very interesting is that they don’t have any organs for hearing.

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