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Cardiovascular

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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
    • High pressure
    • Low volume