inner lining of blood vessels

Endothelium is a layer of cells that line the walls of the circulatory system which carries blood around the body.[1] The cells form a membrane so that certain substances, such as nutrients, can move through the walls. In an adult human there is about 1 kg of endothelium cells, which would cover an area of about 7m2.[1] The endothelium plays an important part in controlling the flow of blood around the body.

Diagram showing the location of endothelial cells
Transmission electron micrograph of a microvessel showing endothelial cells, which encircle an erythrocyte (E), forming the innermost layer of the vessel, the tunica intima.
SystemCirculatory system
LocationLining of the inner surface of blood vessels and lymphatic vessels
Anatomical terms of microanatomy

References change

  1. 1.0 1.1 Cines, Douglas B. (2012). "Endothelial Cells in Physiology and in the Pathophysiology of Vascular Disorders". bloodjournal.hematologylibrary.org. Retrieved 25 October 2012.