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The endothelium is a thin, smooth layer found in blood vessels, lymphatic vessels and the heart. It is made up of many endothelial cells[1]. Considering its function, it acts as a semi-selective barrier between the vessel lumen and surrounding tissue, controlling the passage of materials and the transit of white blood cells into and out of the bloodstream[2]. It also repairs damaged or diseased organs via an injection of blood vessel cells[3].


  1. http://www.ncbi.nlm.nih.gov/books/NBK26848/
  2. Eskin, S.G.; Ives, C.L.; McIntire, L.V.; Navarro, L.T. "Response of cultured endothelial cells to steady flow". Microvascular Research. 28 (1): 87–94. doi:10.1016/0026-2862(84)90031-1. Jump up ^
  3. Roberts OL, Holmes K, Müller J, Cross DA, Cross MJ (Dec 2009). "ERK5 and the regulation of endothelial cell function". Biochem Soc Trans. 37 (6): 1254–9. doi:10.1042/BST0371254. PMID 19909257.
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