blood clot
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A thrombus, or blood clot stops bleeding. It keeps blood inside a damaged blood vessel, and stops the hemorrhage.

Other namesBlood clot
Blood clot diagram.png
Diagram of a thrombus (blood clot) that has blocked a blood vessel valve
SpecialtyVascular surgery

A blood clot is the final product of the coagulation. There are aggregated platelets and red blood cells. Together with fibrin they form a plug, and stop the bleeding.[1]

The substance making up a thrombus is sometimes called cruor.

A thrombus is a healthy response to injury to prevent bleeding, but can be harmful in thrombosis, when clots block blood flow through otherwise normal blood vessels.[2][3]


  1. "Thrombus: what is it, the mechanism and causes of formation, symptoms". 29 June 2021.{{cite web}}: CS1 maint: url-status (link)
  2. Kumar, Vinay; Abbas, Abul; Aster, Jon (2014). Robbins & Cotran Pathologic Basis of Disease (9th ed.). Philadelphia, PA: Elsevier. ISBN 9781455726134. OCLC 879416939.
  3. "Venous thromboembolism (VTE) | McMaster Pathophysiology Review". Archived from the original on 2018-11-03. Retrieved 2018-11-03.