The guts, blood, and blood vessels make up the cardiovascular element of the circulatory system. It consists of the pulmonary circulation, a “loop” by means of the lungs the place blood is oxygenated. It additionally incorporates the systemic circulation, which runs by means of the remainder of the physique to offer oxygenated blood, **The pulmonary circulatory system sends oxygen-depleted blood away from the center by means of the pulmonary artery to the lungs and returns oxygenated blood to the center by means of the pulmonary veins, **Oxygen-deprived blood enters the suitable atrium of the center and flows by means of the tricuspid valve (proper atrioventricular valve) into the suitable ventricle. From there it’s pumped by means of the pulmonary semilunar valve into the pulmonary artery on its approach to the lungs. When it will get to the lungs, carbon dioxide is launched from the blood and oxygen is absorbed. The pulmonary vein sends the oxygen-rich blood again to the center.