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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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snowhite snowhite
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8 years ago
The semilunar valves are closed when
A) the ventricles are contracting.
B) atria are contracting.
C) the atrioventricular valves are closed.
D) the ventricles are relaxing.
Textbook 
Human Anatomy

Human Anatomy


Edition: 7th
Authors:
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WideEyesWideEyes
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8 years ago
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snowhite Author
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8 years ago
I really appreciate your help!
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#3
8 years ago
Good luck on your exam, snowhite!
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