Mammal Heart Chambers Explained
Mammals, including humans, possess a highly evolved circulatory system featuring a four-chambered heart. This characteristic is shared with birds and crocodilians.
Structure of the Mammalian Heart
The four chambers are essential for efficient oxygen transport and metabolic processes:
- Right Atrium: Receives deoxygenated blood from the body.
- Right Ventricle: Pumps deoxygenated blood to the lungs.
- Left Atrium: Receives oxygenated blood from the lungs.
- Left Ventricle: Pumps oxygenated blood to the rest of the body.
This complete separation of oxygenated and deoxygenated blood prevents mixing, allowing for higher metabolic rates compared to animals with fewer chambers (like amphibians or reptiles).
Therefore, mammals have four heart chambers.
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