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Cardiovascular System: Closed Circulatory System

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Cardiovascular System: Closed Circulatory System
When your heart contracts and forces blood into the blood vessels, there is a certain path that the blood follows through our body. The blood moves through pulmonary circulation and then continues on through systemic circulation. Pulmonary and systemic are the two circuits in the two-circuit system of higher animals with closed circulatory systems. As the heart pumps, blood is pushed through our body through the entire circulatory system. Oxygenated blood is pumped away from the heart to the rest of the body, while deoxygenated blood is pumped to the lungs where it is re-oxygenated before returning to the heart.
The total blood volume is unevenly distrubted among the arteries, veins, and capillaries. The heart arteries and capillaries in the pulmonary and systemic circuits normally contain30 percent of blood volume like 1.5 liters of whole blood. And the venous system contains the rest 65-70 percent and that’s about 3.5 liters. One third roughly of the blood in the venous system is circulating within the liver, bone marrow and skin. …show more content…
When the blood circulates within our system, chemicals are exchanged by diffusion. Our cardiovascular system is made up of our heart, arteries and our veins. There is an important difference between the veins and the arteries. That difference is the flow or direction of the blood. Veins carry blood to the heart and arteries carry blood away from the heart. Most but not all arteries carry oxygenated blood. At some point during the circulation of the blood the pulmonary artery carries deoxygenated blood from the heart and to the lungs in which the blood is then
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