育龄妇女每月都要来月经,那是由于子宫内膜因生理性脱落引起出血的结果。在日常生活和工作中,人人都难免遇到些小创伤:刮胡子刮破皮肤,缝衣针刺伤手指……引起出血。这些出血,最后绝大多数都能很快自动止血,不会对人体造成伤害。 血管损伤引起的出血为何能够自动停止呢?原来,血液中有一些叫做凝血因子的神秘物质, Women of childbearing age every month to come to menstruation, it is due to physiological endometrial bleeding caused by the results. In daily life and work, everyone will inevitably encounter some minor trauma: shaving scratch the skin, sewing needle stab finger ... cause bleeding. These bleeding, the vast majority of the last auto stop bleeding quickly, will not cause harm to the human body. Why blood vessels caused by injury can automatically stop bleeding? It turned out that there are some blood in the blood clotting factor called the mysterious material,