In comparing the four chambers of the heart, the _______ have weak, thin walls and the ____ have thick muscular walls.
A. right atrium and right ventricle; left atrium and left ventricle
B. left atrium and left ventricle; right atrium and right ventricle
C. right and left atria; right and left ventricles
D. right and left ventricles; right and left atria
C. right and left atria; right and left ventricles
Biology & Microbiology
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