single and double circulation system
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A type of circulation in which blood flows through the heart twice is called double circulation. This type of circulatory system has separate systemic circulation and pulmonary circulation. ... The systemic veins carry deoxygenated blood from various parts of the body to the right atrium of the heart.
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A type of circulation in which blood flows through the heart twice is called double circulation. This type of circulatory system has separate systemic circulation and pulmonary circulation. ... The systemic veins carry deoxygenated blood from various parts of the body to the right atrium of the heart
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