T. Clark Brelje, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
Robert L. Sorenson, Ph.D.
University of Minnesota
Department of Genetics, Cell Biology and Development
6-160 Jackson Hall
321 Church St SE
Minneapolis, MN 55455
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Arterioles and venules are small diameter blood vessels that allow blood flow to and from capillary beds, respectively. Compare this slide (Verhoeff) with MH 024 H&E.
Arteriole - small diameter blood vessel that branches out from arteries and leads to capillaries.
Their wall is composed of an endothelial cell and only one or two layers of smooth muscle. An inner elastic lamina is usually absent from smaller arterioles. The thickness of wall is usually similar in size to the diameter of the lumen.
Arteriole #1 - has one to two layers of smooth muscle and a remnant of an inner elastic lamina.
Arterioles #2 - has one to two layers of smooth muscle and a remnant of an inner elastic lamina.