| Front | Smooth muscle of arterial walls |
|---|---|
| Back | Structure: arteries throughout the body have smooth muscle surrounding them, which is innervated by motor neurons of ANS - typically just the sympathetic axons Function: 1. Vasoconstriction - sympathetic innervation causes contraction of smooth muscles 2. Vasodilation - usually passive process due to blood pressure Important exception: coronary arteries 1. vasoconstriction via parasympathetic innervation 2. vasodilation via sympathetic innervation |
Tags: cardiovascular
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