The myocardium directly receives its blood supply from the __________ arteries.

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


Answer: coronary

Anatomy & Physiology

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In general, as an artery's diameter decreases, the artery walls show

A.  a decrease in the relative amount  of smooth muscle and an increase in the relative amount  of elastic fibers.
B.  an increase in the relative  amount of smooth muscle and a decrease in the relative amount  of elastic fibers.
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D.  a decrease in both smooth muscle and elastic fibers and an increase in areolar connective tissue.

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