★ Human Circulatory System Quiz
How does the heart work?
A. It pumps blood first to the lungs, back to the heart and then around the rest of the body.
B. It pumps blood first to the rest of the body, back to the lungs and then to the heart.
C. It pumps blood around the rest of the body, back to the heart and then to the lungs,
Preview next quiz:
Left atrium receives oxygenated blood through
A. Coronary artery
B. Aorta
C. Pulmonary artery
D. Pulmonary vein
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