The left ventricle in mammals is more muscular than the right ventricle because
A) the right ventricle only pumps blood into the right atrium.
B) the left ventricle has to pump blood throughout the body at high pressure.
C) the left ventricle pumps more total blood than the right ventricle.
D) the left ventricle is always contracting to maintain a systemic blood pressure.
Correct Answer:
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