blood clot

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

Other namesBlood clot
Diagram of a thrombus (blood clot) that has blocked a blood vessel valve
Medical 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.

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.[1][2]


  1. Kumar, Vinay; Abbas, Abul; Aster, Jon (2014). Robbins & Cotran Pathologic Basis of Disease (9th ed.). Philadelphia, PA: Elsevier. ISBN 9781455726134. OCLC 879416939.
  2. "Venous thromboembolism (VTE) | McMaster Pathophysiology Review". Archived from the original on 2018-11-03. Retrieved 2018-11-03.