Vasoconstriction, where smooth muscle in arterioles contracts, reduces blood flow into capillary beds, while vasodilation, where the muscle relaxes, allows blood to flow into them again.
Vasoconstriction, where smooth muscle in arterioles contracts, reduces blood flow into capillary beds, while vasodilation, where the muscle relaxes, allows blood to flow into them again.
| Front | Describe the processes of vasoconstriction and vasodilation and how this affects blood flow through capillaries. |
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| Back | Adjusting blood flow:
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