Atrioventricular valves prevent backflow into the

A) ventricles.
B) atria.
C) venae cavae.
D) aorta.
E) pulmonary trunk.


B) atria.

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

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A. chassis B. frames C. shields D. panels E. all of the above

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If using a heat pump rooftop unit, why is proper height off of the roof important?

What will be an ideal response?

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