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Q7
(CDS-I/2026)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
In humans, which chamber of the heart receives oxygen-rich blood from the lungs first ?
Result
Your answer:
—
·
Correct:
A
Explanation
The human heart functions through a double circulation system. Oxygen-rich (oxygenated) blood returns from the lungs via the pulmonary veins and enters the Left Atrium first. This makes the left atrium the initial chamber to receive oxygenated blood.
- Left Atrium: Receives oxygenated blood from the lungs.
- Left Ventricle: Receives blood from the left atrium and pumps it to the entire body through the aorta.
- Right Atrium: Receives deoxygenated blood from the body's tissues via the vena cava.
- Right Ventricle: Pumps deoxygenated blood to the lungs for gas exchange via the pulmonary artery.
Because the pulmonary veins specifically drain into the left atrium, option A is the correct answer.
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