Which structures act as anchors for the atrioventricular valves?
a. Chordae tendineae
b. Great vessels
c. Coronary ostia
d. Trabeculae carneae
ANS: A
The atrioventricular valve openings are attached to the papillary muscles by the chordae tendine-ae. The great vessels are the vessels that bring blood to and out of the heart and are not attached to the chordae tendineae. The coronary ostia are openings in the aorta for the coronary arteries. The trabeculae carneae are a portion of the myocardium.
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