Science Questions and Answers

Start Your Free Trial

What is the sequence of events that occurs during blood clotting?

Expert Answers info

bandmanjoe eNotes educator | Certified Educator

calendarEducator since 2011

write1,351 answers

starTop subjects are Science, Literature, and Social Sciences

The technical term for blood clotting is called coagulation.  It is a process which has been best studied in humans, and undergoes the following steps:

1. Coagulation (clotting) begins almost immediately after damage has occured to the endothelium, or the lining of the blood vessel.

2. Platelets clump together and start to form a plug at the site of the injury.  A blood protein known as fibrinogen assists in the platelets adhering to each other to form this "plug".

3.The plug by the platelets is known as "primary hemostasis".

4. "Secondary hemostasis" occurs simultaneously with the production of fibrin, which is a cascade of fibers produced byt the blood protein fibrinogen, which serves to further seal the injury from within the blood vessel.

5. Upon aging, or drying, the accumulation of platelets and fibrin compose what is generically called a "scab"; the scab seals off the internal part of the vessel from invading pathogens that would otherwise do it harm from the outside world.

check Approved by eNotes Editorial