Q8 of 21 Page 58

What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart?

The human heart is a muscular organ, divided into four chambers by a muscular wall-like structures. The upper two chambers are called the atrium , and the lower two are called ventricles. This clear division of heart into compartments prevents mixing of oxygenated and deoxygenated blood.


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