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Question

To avoid the mixing of oxygenated and deoxygenated blood, the heart has ........... chambers.


A
Four
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B
Two
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C
Three
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D
Six
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Solution

The correct option is A Four
The heart has four chambers two atria and two ventricles. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle. The left ventricle pumps the oxygen-rich blood to the body. The one-way valves present in the heart prevents the backflow of blood, so, O$$_2$$ rich and CO$$_2$$ rich blood can not be mixed.
So, the correct answer is option A.

Biology

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