Arteries and Arterioles
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- Topic Anchor: Arteries & Arterioles
- Blood vessels taking blood away from the heart
- Structure:
- Wrapped in thick layer of smooth muscle
- Contract for vasoconstriction, relax for vasodilation
- Innervated by nervous system
- Inside lined with endothelial cells
- Arterioles are small branches of arteries that lead to capillaries
- Wrapped in thick layer of smooth muscle
- High pressure
- Low volume