The ________ valves prevent the backflow of blood into the heart.

A. Mitral
B. atrioventricular
C. Semilunar
D. Tricuspid


Answer: C

Health & Biomechanics

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Fill in the blank(s) with the appropriate word(s).

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Indicate whether the statement is true or false.

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Sensitive tissue in the right atrium wall that begins the heartbeat:

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