Why is the left side of the heart stronger than the right side of the heart?
A) The left side pumps blood to the right side of the body, which has more muscle mass.
B) The right side pumps only to the lungs, and the left side pumps blood around the whole body.
C) The right side pumps blood only to the brain, and the left side pumps blood around the whole body.
D) The left side receives more oxygen from the lungs.
Answer: B
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