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Explain the evolution of heart in vertebrates

SOMEONE HELP PLZZZ
IM RLLY NOT UNDERSTANDING THIS SO PLZ EXPLAIN WELL AND THANK YOU

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Answer:

The evolution of the heart is based on the separation of oxygenated blood from deoxygenated blood for efficient oxygen transport. pisces have a dual chambered heartwhile reptiles and amphibians are having a three chambered finally aves and mammals have four chambered hearts.

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