Double circulation is a mechanism in which blood circulates twice through the heart in one complete cycle. It is the most efficient way of circulation found in all mammals. In this system, the blood flows through the heart twice, and it is called double circulation because blood passes through the heart twice per circuit. The heart consists of two sides: the right side that pumps deoxygenated blood into the pulmonary section and the left side that pumps oxygenated blood into the systemic circulation. The double circulation system is divided into two parts: pulmonary circulation and systemic circulation.
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Pulmonary circulation: The right side of the heart pumps deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart.
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Systemic circulation: The left side of the heart pumps the newly oxygenated blood around the body. By the time this blood returns to the heart, it has returned to a deoxygenated state.
Double circulation is significant because it allows for the separation of oxygenated and deoxygenated blood, which is necessary for efficient oxygen delivery to the body.
