Venule

Venule
Types of blood vessels, including a venule, vein, and capillaries
Details
Identifiers
Latinvenula
MeSHD014699
TA98A12.0.00.037
TA23903
THH3.09.02.0.03002
FMA63130
Anatomical terminology

A venule is a very small vein in the microcirculation that allows blood to return from the capillary beds to drain into the venous system via increasingly larger veins. Post-capillary venules are the smallest of the veins with a diameter of between 10 and 30 micrometres (μm). When the post-capillary venules increase in diameter to 50μm they can incorporate smooth muscle and are known as muscular venules.[1] Veins contain approximately 70% of total blood volume, while about 25% is contained in the venules.[2] Many venules unite to form a vein.

  1. ^ Standring, Susan (2016). Gray's anatomy : the anatomical basis of clinical practice (Forty-first ed.). [Philadelphia]. p. 131. ISBN 9780702052309.{{cite book}}: CS1 maint: location missing publisher (link)
  2. ^ Woods, Susan (2010). Cardiac Nursing. New York: Lippincotts. p. 955. ISBN 9780781792806.