the function of platelets
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The principal function of platelets is to prevent bleeding. Red blood cells are the most numerous blood cell, about 5,000,000 per microliter.
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Platelets have the following functions:
- Secrete vasoconstrictors which constrict blood vessels, causing vascular spasms in broken blood vessels.
- Form temporary platelet plugs to stop bleeding.
- Secrete procoagulants (clotting factors) to promote blood clotting.
- Dissolve blood clots when they are no longer needed.
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