In the heart dissection you performed, you noted the muscular walls of the ventricles. the walls of the atria, however, were much thinner. why do you think the ventricular walls are so much thicker that the atrial walls?

The correct answer is that ventricles have to pump blood very far in the body.

Explanation:

The human heart contains four chambers. The right chambers of the heart are the right atrium and right ventricle and left side left atrium and left ventricle.

Ventricles have thick walls than atria as they have a thin wall comparatively because they have to do more work than the atrium. The atria are chambers that gets incoming blood. On the other hand, the chambers of ventricles pump the blood out of the heart. Even the left ventricle has thick walls than the right ventricle. Blood is propelled out of the heart with greater pressure from ventricles compared to the atria.

Thus, the correct answer is that ventricles have to pump blood very far in the body.

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