In comparing the four chambers of the heart, the _______ have weak, thin walls and the ____ have thick muscular walls.

Question

Quizplus · Accepted Answer

The atria (right and left atria) have thinner walls because they only need to pump blood a short distance to the ventricles, whereas the ventricles (right and left ventricles) have thicker, more muscular walls to pump blood out of the heart to the lungs or to the rest of the body.

In Comparing the Four Chambers of the Heart, the _______