Artery and arteriole walls have elastic tissue that stretches and recoils to even out pressure, and muscle that contracts to change lumen diameter and regulate flow. The smooth epithelium reduces friction and prevents clots.
Artery and arteriole walls have elastic tissue that stretches and recoils to even out pressure, and muscle that contracts to change lumen diameter and regulate flow. The smooth epithelium reduces friction and prevents clots.
| Front | Explain how the structures of the walls of arteries and arterioles are related to their functions. ( 6 marks) |
|---|---|
| Back | Elastic tissue 1 Elastic tissue stretches under pressure/when heart beats; 2 Recoils/springs back; 3 Evens out pressure/flow; Muscle 4 Muscle contracts; 5 Reduces diameter of lumen/vasoconstriction/constricts vessel; 6 Changes flow/pressure; Epithelium 7 Epithelium smooth; 8 Reduces friction/blood clots/less resistance; |
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