Final answer:
The process of stopping bleeding involves vascular spasm, platelet plug formation, and coagulation.
Step-by-step explanation:
When there is a wound causing bleeding, the body responds by clotting the blood and constricting the blood vessels at the site of injury to stop the bleeding. This process involves three steps: vascular spasm, platelet plug formation, and coagulation. Vascular spasm is a contraction of the smooth muscles in the walls of the blood vessels to constrict blood flow, while platelet plug formation involves platelets clumping together and temporarily sealing small openings in the vessel. Coagulation enables the repair of the vessel wall by forming a fibrin clot to permanently stop the bleeding.