Clot
Clot
Clot (/klɒt/), also known as a blood clot, is a semi-solid mass formed by the coagulation of blood.
Etymology
The term "clot" originates from the Old English word "clott," meaning a lump or mass.
Definition
A clot is a collection of blood cells and fibrin strands that form in response to injury, to prevent bleeding and aid in healing. Clots can also form within blood vessels, potentially causing serious health problems such as stroke or pulmonary embolism.
Formation
Clot formation, or coagulation, is a complex process involving numerous coagulation factors. When a blood vessel is injured, platelets adhere to the damaged site and release substances that activate other platelets and coagulation factors. This leads to the formation of a fibrin mesh that traps blood cells, forming a clot.
Types of Clots
There are two main types of clots:
- Thrombus: A clot that forms in a blood vessel and remains there.
- Embolus: A clot that forms in one location and travels to another part of the body.
Related Terms
- Thrombosis: The formation of a thrombus.
- Embolism: The sudden blockage of a blood vessel by an embolus.
- Anticoagulant: A substance that prevents coagulation, thus preventing the formation of clots.
- Hemostasis: The process of stopping bleeding, which involves clot formation.
Health Risks
While clot formation is a crucial part of the body's response to injury, abnormal clot formation can lead to serious health problems. These include:
- Deep vein thrombosis (DVT): A clot in a deep vein, usually in the leg.
- Pulmonary embolism (PE): A clot that travels to the lungs.
- Stroke: A clot in the brain.
- Heart attack: A clot in the coronary arteries.
External links
- Medical encyclopedia article on Clot
- Wikipedia's article - Clot
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