Correct Answer:
Option A - Platelets are tiny blood cells that help your body from clots to stop bleeding. If one of your blood vessels gets damaged, it sends out signals to the platelets. The platelets then rush to the site damage and form a plug (clot) to fix the damage.
A. Platelets are tiny blood cells that help your body from clots to stop bleeding. If one of your blood vessels gets damaged, it sends out signals to the platelets. The platelets then rush to the site damage and form a plug (clot) to fix the damage.