What is Cardiovascular system?
Cardiovascular system meaning The cardiovascular (circulatory) system consists of the heart and a system of blood vessels (arteries, capillaries, veins) through which blood is transported from the heart to the tissues of the body and back again. The heart is a double pump, driving the blood through two circuits.The pulmonary circuit conveys blood from the right side of the heart to the lungs and then returns it to the left side of the heart.The systemic circuit carries blood from the left side of the heart to the rest of the body and returns it to the right side of the heart. If there were no mechanism for constantly changing or freshening the tissue fluid of the body, it would soon become depleted of food and oxygen and become saturated with waste products. In addition to its primary function of transporting various substances to and from body cells, the circulatory system contributes to cellular metabolism, balance (homeostasis) of fluid volume, balance of Ph (hydrogen-ion concentration), homeostasis of body temperature, and defense against microorganisms.