MEDICAL PHYSIOLOGY

Detailed explanation-1: -The correct option is A Circulation. the heart is the central organ of the circulatory system. As the heart beats, it pumps blood through a system of blood vessels. the heart along with the circulatory system constitutes the circulatory system. The movement of blood through the heart and the body is called circulation.

Detailed explanation-2: -Pulmonary circulation moves blood between the heart and the lungs. It transports deoxygenated blood to the lungs to absorb oxygen and release carbon dioxide. The oxygenated blood then flows back to the heart. Systemic circulation moves blood between the heart and the rest of the body.