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An arterial anastomosis is when more than one artery fuses before giving rise to arterioles. An arterial anastomosis in effect provides an insurance policy for capillary beds: If one artery is compressed or blocked, the others can continue to deliver blood to the capillary bed, and dependent tissues will not be damaged. Arterial anastomoses occur in the brain, in the coronary circulation, and in many other sites as well.

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15y ago

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