Question

Why is human heart four chambered whereas frogs and reptiles have three chambered heart

Answer 1

Answer:

The 3-chambered heart of amphibians works because of their supplemental skin respiration, while the 3-chambered heart of reptiles works because the septum makes it almost a 4-chambered heart. Mammals and birds have complete separation of pulmonary and systemic circulation.

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Answer 2

The four chambered heart helps in double circulation of oxygenated and deoxygenated blood. Frogs and reptiles do not possess the ability of double circulation and hence do not have a four chambered heart.

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