★ Transport System in Man Quiz
What is the function of valves in heart?
A. To prevent the backflow of blood in the chambers.
B. To allow the backflow of blood in the heart.
C. To initiate the flow of the blood in the heart.
Preview next quiz:
What is a major organ used in the circulatory system?
A. Lungs
B. Kidneys
C. Liver
D. Heart
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