Elaborate the evolutionary change in the …
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Preeti Dabral 2 years, 11 months ago
The heart of fish has two chambers. This means there is no separate circulation for oxygenated and deoxygenated blood. There is separation of two chambers in the atrium of amphibians. This has further evolved for partial separation of ventricle as well in reptiles. Finally in birds there is complete separation of oxygenated and deoxygenated blood circulation due to advent of four chambers in the heart. Mammal heart is the most developed having the most efficient double circulatory system with four chambers and separation of two blood streams.
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