Multiple Choice
In what way does a notochord differ from a proper backbone in vertebrates?
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7. The Skeletal System
Introduction to the Skeleton
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In the heart's gross anatomy, what structures anchor the chordae tendineae?
A
Semilunar valves
B
Papillary muscles
C
Interventricular septum
D
Atrioventricular valves
Verified step by step guidance1
Understand the role of chordae tendineae: These are tendon-like cords that connect the heart valves to the heart muscles, specifically the atrioventricular valves (tricuspid and mitral valves).
Identify the function of the chordae tendineae: They prevent the inversion or prolapse of the valves during ventricular contraction by anchoring them to the heart muscles.
Recognize the structures involved: The chordae tendineae are anchored to the papillary muscles, which are located in the ventricles of the heart.
Differentiate between the types of heart valves: The atrioventricular valves (tricuspid and mitral) are connected to the chordae tendineae, while the semilunar valves (aortic and pulmonary) are not.
Conclude that the papillary muscles are the structures that anchor the chordae tendineae, ensuring proper valve function during the cardiac cycle.
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