PATHOLOGY

Detailed explanation-1: -The two bottom chambers are the right ventricle and the left ventricle. These pump blood out of the heart. A wall called the interventricular septum is between the two ventricles. The two top chambers are the right atrium and the left atrium.

Detailed explanation-2: -The muscles of the ventricles then contract, and blood is pumped through the pulmonary and aortic valves into the main arteries.

Detailed explanation-3: -The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.