Name two groups of warm-blooded animals with four-chambered hearts.
GeneralClass 12AllAnswered 27 Mar 2026
Answer
The two groups of warm-blooded (endothermic) animals with four-chambered hearts are:
- Birds (Class Aves): Including eagles, sparrows, penguins, ostriches, and all other avian species
- Mammals (Class Mammalia): Including humans, whales, bats, elephants, and all other mammalian species
The four-chambered heart (two atria and two ventricles) allows complete separation of oxygenated and deoxygenated blood, maximizing oxygen delivery to tissues. This efficient circulatory system supports the high metabolic demands of maintaining constant body temperature independent of environmental conditions—a defining feature of endothermy. Both groups evolved this adaptation independently, representing convergent evolution.
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