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In humans, what is the sequence of vessels, heart chambers, and heart valves through which the...

In humans, what is the sequence of vessels, heart chambers, and heart valves through which the blood passes when returning to the heart from the tissues and then traveling back to the tissues?

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In Humans, the blood passes through the heart two times. Therefore, this type of blood circulation is called Double circulation. The deoxygenated blood is drained from the body organs by the systemic veins and enter the heart(right atrium) via the Vena Cavae. The oxygenated blood from the lungs is brought to the heart by the Pulmonary vein and supplied to the body organs via the Aorta.

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The pulmonary circulation pathway begins when the deoxygenated blood from the tissues leaves the right ventricle, then enters the lungs and this oxygenated blood enters the left atrium and ventricle. From the draining of the oxygenated blood from the left ventricle in the Aorta to be supplied to the body organs via the systemic capillaries. This is the Systemic circulation pathway. The organs then drain the oxygen-poor blood into the systemic veins and the circulation continues.

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