Vascular Anastomoses

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Chapter: Anatomy and Physiology for Health Professionals: Vascular System

Vascular anastomoses are interconnections formedby blood vessels.

Vascular Anastomoses

Vascular anastomoses are interconnections formedby blood vessels. Arterial anastomoses form by the merging of arteries that supply the same body tissues. Such anastomoses provide collateral channels so blood can reach these tissues. For example, if an artery is blocked by a clot or cut, a collateral channel may be able to provide required blood to the region. In the body, most organs receive blood from more than one arterial branch.

Arterial anastomoses develop around joints in areaswhere blood flow through a channel may be slowed or stopped by active movement. These anastomoses also commonly occur in the brain, heart, and abdom-inal organs. The arteries of the kidneys, retina, and spleen usually do not anastomose or have little collateral¬≠more freely than arteries, venous anastomoses are very common. Because of this, an occluded vein rarely stops blood flow or causes tissue death.

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