Why precapillary sphincters wrap aroung the root

Reference no: EM1398078

1. Why do vessels branch to form capillary beds?
2. Why do precapillary sphincters wrap aroung the root of each capillary where it leaves the metarteriole?
3. Veins are the blood vessels that conduct blood from the capillaries towards the heart. What is the misconception?
4. Do all arteries carry oxygen rich blood?

Reference no: EM1398078

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