What is the utility of pre-capillary spinchters?

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Preceding a capillary. Used of an arteriole or venule.

1. located just to the arterial side of a capillary.
2. arterial capillary.
3.a vessel lacking complete coats, intermediate between an arteriole and a capillary.
4.capillaries with a muscle layer which controls the flow of blood from the arterioles into the capillary bed.
5.Smooth muscle cells that guard the entrance to capillaries.

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