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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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Cali Fornia Cali Fornia
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7 years ago
What produces the "lub dub" heart sounds?
A) the contraction of the atria, and then the ventricles
B) the relaxation of the atria, and then the ventricles
C) the sound of blood traveling through the heart
D) the vibrations of the ventricular and blood vessel walls when valves shut
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Human Anatomy & Physiology

Human Anatomy & Physiology


Edition: 1st
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portalgoal!portalgoal!
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7 years ago
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Cali Fornia Author
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7 years ago
Thank you, thank you, thank you!
Fanmkreyol
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You make an excellent tutor!
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Thanks for your help!!
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