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The blood platelets are the cells in the blood, which are responsible for the blood clotting.

Its normal life span is 7 days.

Its half life is about 2 to 3 days.

If the blood sample is collected at 10 am in the morning, then the number of platelets in the blood sample will reduce with the passage of time.

If the blood is taken from the center of the blood vessel then the number of platelets will be high.