Endothelial cell

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Endothelial cells make up the endothelium which lines the inner surface of the lymphatic system, blood vessels and also the heart. Among their functions are coagulation, blood vessel formation, inflammation, relaxation of arterial smooth muscle and fibrinolysis[1].

There is a varying number between the amount of smooth muscle and connective tissue because different vessels that carry out distinct functions and have a different structure. As an example, bigger diameter more smooth muscle and more connective tissues are available e.g. Artery[2].

Figure 1 - Corss-section diagram of blood vessels

Figure 1 - Cross-section diagram of blood vessels[3].


  1. Michiels, C. (2003) Endothelial Cell Functions.Journal of Cellular Physiology. 196(3). pp. 430-432
  2. Alberts, B., Johnson, A., Lewis, J., Wilson, J. and Hunt, T. (2015). Molecular biology of the cell. 6th ed. Abingdon: Garland Science, Taylor and Francis Group, p. 1235.
  3. Lonza.com. (2017). Endothelial Cells and Functions. [online] Available at: https://www.lonza.com/campaigns/bioresearch/endothelium-cells-and-functions.aspx [Accessed 4 Dec. 2017].
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