Double Circulation

Double circulation refers to the process of blood flowing through the heart twice in one complete circuit of the body. The first circuit involves the flow of deoxygenated blood from the heart to the lungs and back to the heart. The second circuit involves the flow of oxygenated blood from the heart to the rest of the body and back to the heart.

Heart

The heart, a complex muscular organ, pumps oxygen and nutrient-rich blood to every cell and tissue in the body. It resides in the chest between the lungs and consists of four chambers, valves, and an electrical system that controls its rhythm. The heart is vital for sustaining life.

Pulmonary Circuit

The pulmonary circuit is a part of the double circulation system that carries deoxygenated blood from the heart to the lungs and oxygenated blood back to the heart. The right ventricle pumps deoxygenated blood to the lungs. In the lungs, the blood picks up oxygen and releases carbon dioxide through respiration before returning to the heart.

Systemic Circuit

The systemic circuit is a part of the double circulation system that carries oxygenated blood from the heart to the body's tissues and returns deoxygenated blood to the heart. The left ventricle pumps oxygenated blood to the body's tissues, where oxygen is delivered to the cells, and the blood picks up carbon dioxide and then returns to the heart.

Red Blood Cells (RBCs)

Red blood cells, also known as erythrocytes, are the most common type of blood cell in the human body. They are responsible for carrying oxygen from the lungs to the body's tissues and carrying carbon dioxide, a waste product, from the tissues back to the lungs to be exhaled.