Tags: Anatomical Structure, Vein.
A venule is a very small blood vessel in the microcirculation that allows blood to return from the capillary beds to the larger blood vessels called veins. Venules range from 7 to 50μm in diameter. Veins contain approximately 70% of total blood volume 25% of which is contained in the venules.Venules are blood vessels that drain blood directly from the capillary beds. Many venules unite to form a vein.
