AP BIOLOGY

Detailed explanation-1: -Ventricles have thicker walls than auricles because they have to pump blood to different organs and the pressure with which the blood flows through them is more than the auricles. Therefore, the walls are thicker in ventricles than in auricles.

Detailed explanation-2: -The two atria are thin-walled chambers that receive blood from the veins. The two ventricles are thick-walled chambers that forcefully pump blood out of the heart.

Detailed explanation-3: -Solution : It is because auricles have to pump blood to ventricles which are lying below them and ventricles have to pump to all parts of the body.

Detailed explanation-4: -The ventricles have thick muscular walls whereas the auricles have thin walls.

Detailed explanation-5: -Left Ventricle. The left ventricle is the main powerhouse of the heart, having to pump blood all the way around the systemic circulation. Because of this it has the largest, most muscular walls of any of the chambers. In fact, it is three times as thick as the right ventricle.