1.2.5 Anatomy Physiology and Health Education I
Lab 1 Determination of clotting time with the help of Wrighting's method (cont'd...)
Intrinsic pathway (contact with glass, tin etc.)
Clotting time is the time taken to coagulate the blood after rupture of blood vessels. Normally it is 3-8 minutes for a normal human's blood depending upon platelets count (200000 to 350000 /cubic mm) and other clotting factors inside the plasma.
When a blood vessel is damaged, clotting is required to stop the loss of blood (haemostasis) and healing of the vessel, in which platelets play a vital part. Now it is clear that every factor is equally important for the clotting of blood and the process is impossible in absence of a single factor as the activation of one factor is done by another factor.
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