What can be truly defined as a heartbeat?
a. Rhythmic contraction and relaxation of left side of the heart followed by the right
side.
b. Rhythmic contraction and relaxation of right side of the heart followed by the left
side.
c. Rhythmic contraction and relaxation of both ventricles followed by both atria.
d. Rhythmic contraction and relaxation of both atria followed by both ventricles.
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rhythmic contraction and relaxation of both ventricles followed by both atria.
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