Blood Circulation
Pump up the blood in the veins
The circulatory system in humans is a closed system subdivided into the pulmonary and the corporal circle of blood circulation. Pulmonary circulation ensures that blood passing through the lungs is oxygenated, the corporal circle distributes oxygen and nutrients to the tissues and removes waste products, in particular carbon dioxide, from them. Deoxygenated blood from the upper and the lower part of the body enters the right atrium and then the right chamber and ends in the pulmonary artery leading to the lungs. There the blood is enriched with oxygen and returns to the heart through pulmonary veins, which end in the left atrium. From there the blood flows to the left ventricle and the aorta which branches out and distributes blood all over the body.
