How does the circulatory system of a frog differ from that of a human?
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Frogs have a THREE chambered heart, not two. Oxygen poor blood flows from right atrium to the ventricle where it is pumped to the lungs and skin to pick up oxygen. Next the blood flows back to the heart, collecting in the left atrium. It them flows to the ventricle and is pumped to the body, dropping off the oxygen. This oxugen poor blood flows back onto the right atrium and it begins again.\n\nThis process is simular in humans except we have two ventricles, and do not breath through or skin as much so the right ventricle pumps to lungs only.
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It circulates through your arteries and veins and capillaries and goes through your heart. The system is called the circulatory system.
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The reason why it is there is that it is more efficient to have a wall. It separates oxygenated from non-oxygenated blood so only oxygenated blood is sent to muscles.\n\nAmphibians and reptiles don't have a wall separating the oxygenated from non-oxygenated blood, they are alive, but their circulatory system is less efficient because some of the blood travelling to the muscles doesn't contain any oxygen.
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Wow, I don't know if they'd let me type 1000 pages on the subject to cover your question even close to adequately, but I'll give the Reader's Digest version a go...\n\nThe circulatory system is a liquid highway your body uses to transport oxygen and nutrients everywhere they need to go and waste products away from those tissues to be disposed.  The heart is a just a positive displacement pump that keeps your blood flowing through the arteries and veins.  Lungs serve as an interface between the circulatory system and the outside world, a place where oxygen can be drawn into the body through the thin membranes of the alveoli to be absorbed by red blood cells and bound by the hemoglobin molecules within, to be carried to every point in the body.  The lungs are also the place where carbon dioxide, also bound by hemoglobin and brought to lungs for disposal, can pass back out and be exhaled.  Much of this system is automatic and completely involuntary, and some of it isn't even controlled by the brain, at least not directly -- you can hold your breath, for instance, but you do have to consciously think about not breathing.  Your brain does have some say in how fast everything works, sending a message to your heart and lungs during times of stress or exertion to say, "Hey!  We're working kind of hard here; maybe we need more oxygen to the muscles!  Work a little faster, please!" and you start to breathe hard and your heart starts to beat faster.
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The frog is a cold blooded or poikilothermal animal whose body temperature rises or falls with that of environmental temperature. \n       The frog can not live in a very hot or very cold environment as the enzyme functioning in there body is hampering out, because in low temperature the enzyme are become in active and at high temperature it become denature due to its thermolabile in nature. Because of these reason, frog needs moist shady environment during summer and lie in an inactive form in the deep layer of soil during winter.
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Circulatory is just like a train or subway. It carries all the blood lightening fast through the body, then back to the station at the heart.
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Your question does not make sense!\n\nFrog muscles are arranged like those in other vertebrates and will have similar names. For example your calf muscle is the gastrocnemius, it is the same in the frog and this is the tasty bit you might eat when served frogs legs.
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hey i am not sure whether this is the right answer....but it was worth a try....\n\n \nRana pipiens, also known as the northern leopard frog, is a very important frog in the ecosystem. The northern leopard frog is a key animal in the food web. Frogs are more important to human survival and our current way of life than you may think! Frogs are so important that ecologists consider them to be bioindicators. In other words, scientists consider the health of a frog population to be a reflection of the health of the entire ecosystem (Encarta, 2001).\n\nDistribution\nThe northern leopard frog, R. pipiens, is common in North America, inhabiting twenty-six states and much of Canada (see adjacent map).\n\nHabitat\nRana pipiens live in a wide range of habitat, from open water and marshes to deserts and mountains (Frogs.org, 2000-2001).\n\nPhysical Characteristics\nThe northern leopard frog is medium in size, averaging from two to five inches long. They are green, brown, or both and have large dark irregular spots covering the dorsal part of their body (NPWRC, 2001). The skin covering R. pipiens is moist and smooth, and contains glands that secrete mucus in order to keep the skin from drying out. Northern leopard frogs also have glands in their skin that secrete poisons, which are strong enough to help them escape from their predators but are not harmful to humans (Encarta, 2001). Rana pipiens have eyes that are very keen, helping them not only capture prey but also to identify danger in their surroundings (Encarta, 2001). The northern leopard frog also has very powerful hind legs which are the main source of power in swimming and jumping. Also useful in swimming are the frog's webbed hind feet (Frog, 2001).\n\nFood and Feeding\nThe diets of tadpoles and froglets differ from those of adult R. pipiens, with the young consuming herbivory such as algae as well as microscopic animals. Adults feed largely on insects, but also slugs, snails, and smaller vertebrates such as chorus frogs (Harding 156-157 and Donegan, 1996).\n\nRelationship to other organisms in the ecosystem\nRana pipiens are common prey of birds such as herons, reptiles such as snakes, and mammals (including humans) (Donegan, 1996). Rana pipiens play an important role to humans. Besides being a source of food, frogs are used at every stage in their life for scientific study (Donegan, 1996). Furthermore, frogs play a key role in integrative pest management, eating agriculturally destructive insects.\n\nReproduction\nCopulation occurs in the water between March and June. The females release eggs while swimming and the male, who attaches himself to the female with specialized thumbs, fertilizes the eggs. The fertilized eggs are then attached to either underwater plant material or simply placed on the bottom of the pond (Frogs.org, 2001). Each female lays up to 3,000 eggs, which hatch 10-20 days after fertilization (Rasmussen, 2001).\n\nDevelopment and Lifespan\nThe frog life cycle (shown to the left) is fairly simple. The frogs begin their lives as eggs, which are laid in clumps. When the eggs hatch the baby frogs are tadpoles and do not have limbs or lungs, like the adult frog. The tadpole undergoes metamorphosis, growing hind legs first, then front legs, and at the same time, developing a well defined head. The gills are replaced with lungs as the froglet adapts to life on land. On land the frog continues to lose its tail and grow in size. Rana pipiens reach sexual maturity in two or three years (Encarta, 2001).\n\nBehavior\nRana pipiens are mostly nocturnal. Rana pipiens travel far distances away from water, but they must return to breed. In order to escape predators the northern leopard frog leaps into the water and buries itself in the mud or, if on land, takes several jumps into the air and then dives under vegetation for cover (Harding, 157). During the winter months northern leopard frogs hibernate.\n\nCommunication\nThe male northern leopard frog uses his croak to att
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Common animal (including human) organs include the heart, lungs, brain, eye, stomach, spleen, pancreas, kidneys, liver, intestines, skin, uterus, and bladder.\n\nBlood vessels exist in varying calibers:\n\nArteries \nAorta (the largest artery, carries blood out of the heart) \nBranches of the aorta, such as the carotid artery, the subclavian artery, the celiac trunk, the mesenteric arteries, the renal artery and the ileac artery. \nArterioles \nCapillaries (the smallest blood vessels) \nVenules \nVeins \nLarge collecting vessels, such as the subclavian vein, the jugular vein, the renal vein and the iliac vein. \nVenae cavae (the 2 largest veins, carry blood into the heart)
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A frog is compleately covered by a soft, thin and moist layer of skin make of two very important layers, the epidermis and the dermis.\nIt does not really protect the frog in any way but, it helps in the process of respiration. Oxygen can actually pass through a frog’s skin, which then enters into their blood.\nFrogs dont only breathe though their skin, some adult frogs have two sac-like lungs.\nWhen a frog is sumerged underwater, its respiration takes place through their skin only.\nThere are many blood vessels that run throughout the frog’s skin. Oxygen can actually pass through it, therefore, it directly enters into the blood. Oxygen can be gotten from water too.
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Don't amphibeous species grow back different limbs?  Besides, I heard they IMPORT their frogs legs from a wide variety of Nations, or at least they could if they ran out (it's not as if they are restricted from free trade, and isolated from the rest of the world).  But logic tells me the bodies would just remain the same, but you would have to do a little research, or actual testing, to find the true answer to your question.   But it is my opinion that my answer is simple enough to make sense to you.
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Octopus it actually has 3 hearts. Each gill has its own heart. Blood picks up oxygen in the gills, but after going through capillaries, it loses pressure. The third heart then pumps the oxygenated blood to the tissues all over the body.
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The first is surface area. The mammalian lung has a huge number pf alveoli compared to lung structures of reptiles and amphibians. The greater the surface area available for gas exchange, the more efficient will be the gas exhange.\n\nThe second requirement for gas exchange is assisted by the mamallian heart of four chambers as opposed to reptilian and many other hearts. There is an enormous amount of the circulatory system that passes directly to the pulmonary arteries and veins. Thus there is sufficient blood circulation in the lung area to remove oxygen and transfer it to the rest of the body.\n\nComparative biology will show far fewer alveoli in non-mammalian hearts (with the exception of birds). The other thing notable from compataive anatomy is that the mamallian heart (and that of birds) is a four chambered pump that does not mix unoxygenated blood with blood that has been oxygentated.\n\nSurface area and increased opportunities for deoxygenated hemoglobin to accept oxygen due to more efficient heart action.
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>Insects have an open circulatory system.\nAn open circulatory system is an arrangement of internal transport present in some invertebrates like mollusks and arthropods in which circulatory fluid in a cavity called the hemocoel bathes the organs directly and there is no distinction between blood and interstitial fluid; this combined fluid is called hemolymph (also spelled haemolymph). Muscular movements by the animal during locomotion can facilitate hemolymph movement, but diverting flow from one area to another is limited. When the heart relaxes, blood is drawn back toward the heart through open-ended pores.\n\n'Hemolymph fills all of the interior (hemocoel) of the body and surrounds all cells.\n\nHemolymph is composed of water, inorganic salts (mostly Na+, Cl-, K+, Mg2+, and Ca2+), and organic compounds (mostly carbohydrates, proteins, and lipids). The primary oxygen transporter molecule is hemocyanin.\n\nThere are free-floating cells, the hemocytes, within the hemolymph. They play a role in the arthropod immune system.
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THE MAIN DIFFERENCE IS THAT AMPHIBIANS ARE DEPENDANT ON WATER. So obviously, adaptation will be based on this difference...\n\nMost reptiles are not as dependent upon nearby water as amphibians. Reptiles have solved the drying-out process by having the skin covered with hard, overlapping scales which help to keep moisture from excaping the body. Reptile eggs do not need to be laid in water because, unlike amphibain eggs, they have a tough shell which helps conserve moisture. Some reptiles may even retain eggs inside the body until they hatch, then giving birth to live young.\n\nreptiles have claws on their feet to help climb, run and dig on land. Because most reptiles are not dependent upon a body of water for reproduction, they can live in places such as deserts where it would difficult for amphibians to survive. Some reptiles, such as crocodilians, many turtles, some snakes and a few lizards have gone back to living in the water, but they breathe air through their lungs and must still emerge from the water to lay their eggs on land
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frogs like to swim in the water and are more aquatic than terrestrial, but they have very well developed meaty leg muscles, (both the calf and the thighs) and many muscles the same as humans which they can use for hopping too. They just use their hind legs for hopping though.  Those puny little arms-hands-muscles are not used for much other than propping themselves up when sitting, or a male may squeeze a female when he is on her back mating with her.
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Circulation of Blood..