English-Hanzi/When a blood vessel (vein or artery) is injured

When a blood vessel (vein or artery) is injured, the body uses platelets and fibrin to form a blood clot to prevent blood loss. Even without injured blood vessels, blood clots can form in the body in some cases.

当血管（静脉或动脉）受伤时，身体会利用血小板和纤维蛋白形成血凝块，以防止失血。即使没有受伤的血管，在某些情况下也会在体内形成血块。