PATHOLOGY

Detailed explanation-1: -The heart has four chambers: two atria and two ventricles. 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.

Detailed explanation-2: -The diaphragmatic surface (inferior surface), directed downward and slightly backward, is formed by the ventricles, and rests upon the central tendon and a small part of the left muscular portion of the diaphragm.

Detailed explanation-3: -The apex of the right ventricle is frequently inferior to that of the left. Figure 2 (A) This dissection of the cardiac base shows the central location of the aortic valve, wedged between the mitral and tricuspid valves, and behind the pulmonary valve.