Question
Arterioles are often referred to as resistance vessels. Why?
Answers
Arterioles receive blood from arteries, which are vessels with a much larger lumen. As their own lumen averages just 30 micrometers or less, arterioles are critical in slowing down-or resisting-blood flow. The arterioles can also constrict or dilate, which varies their resistance, to help distribute blood flow to the tissues.   Your Comment




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