Explain evolution of
heart in animals.
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3
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The evolution of the heart has enabled oxygen and nutrients to be pumped efficiently to body tissues, enabling the oxygen greedy brain to develop…. Invertebrate animals have a simple circulatory system, as opposed to a heart. ... The next evolution of a heart saw the development of a fish heart, the simplest type of heart.
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Embryo hearts show evolution of the heart from a three-chambered in frogs to a four-chambered in mammals. Humans, like other warm-blooded animals, expend a lot of energy and need a lot of oxygen. ... This change affords the turtle's body blood that is slightly richer in oxygen than the frog's.
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