General Science • BiologyMedium
Consider the following statements regarding human blood circulation: 1. Deoxygenated blood from the body tissues enters the right atrium of the heart via the vena cava. 2. Oxygenated blood from the lungs is pumped into the left ventricle before being distributed to systemic circulation. Which of the statements given above is/are correct?
A. 1 only
B. 2 only
C. Both 1 and 2✓ Correct Answer
D. Neither 1 nor 2
💡 Solution & Explanation
Both statements correctly trace the pathways of human double circulation through the chambers of the heart. Deoxygenated blood returns from systemic organs to the right atrium, passes into the right ventricle, and travels to the lungs for gas exchange, after which oxygenated blood returns to the left atrium, enters the left ventricle, and is pumped into the aorta. Valves within the heart chambers prevent the backflow of blood during cardiac contraction cycles.
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