Step 1: Understanding platelets.
Platelets, also known as thrombocytes, are cell fragments involved in blood clotting and prevention of blood loss.
Step 2: Life span of platelets.
Platelets circulate in the blood for about 5–10 days before being destroyed mainly in the spleen.
Step 3: Conclusion.
Hence, the average life span of blood platelets is 5–10 days.