Working of the Human Circulatory System

The human circulatory system works in two loops one for the oxygenated blood and the other for the deoxygenated blood.

For deoxygenated blood; the blood from tissue capillaries reaches the veins and then into the superior and inferior vena cava and flows into the right atrium, then to the right ventricle through the tricuspid valve. Then through the pulmonary valve, it gets pumped into the pulmonary artery. Through the pulmonary artery, it reaches the capillaries of the lungs where deoxygenated blood becomes oxygenated.

For oxygenated blood; the blood from the lungs flows into the left atrium through the pulmonary veins, then into the left ventricle through the mitral valve. Then through the aortal valve, it gets pumped into the aorta. Some amount of blood goes into the coronary circulation and the rest reaches the tissue capillaries through the arteries where the oxygenated blood becomes deoxygenated.

The human circulatory system is a complex system consisting of different types of tissues. The main organ of the human circulatory system is the heart which pumps blood throughout the body. The human circulatory system also consists of a vast network of vessels or pipelines that carry blood throughout the body. The main purpose of the human circulatory system is to transport various essential substances that are required for the survival of the body.