Why is blood circulation in human is called double circulation ???????
Answers
Because the blood circulation in humans involves two different pathways or cycles of blood circulation, making it a double circulation.
They are:
Pulmonary circulation: Circulation of blood between the heart and the lungs. During this cycle, the deoxygenated blood from the heart enters the lungs for oxygenation. After oxygenation, the blood re-enters the heart.
Systemic circulation: Circulation of blood between the heart and all body parts. During this cycle, the oxygenated blood is forced out of the heart into the body parts, and the deoxygenated blood from the body parts is carried back to the heart.
The human blood circulation is known as a double circulation because blood from your body must firstly be circulated to your lungs through the pulmonary arteries, called the pulmonary circulation to recieve oxygen and dump carbon dioxide. This then returns to the heart through the pulmonary veins into your left atrium.
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