text: （四）抗凝血及纤维蛋白溶解系统功能人体内除了凝血系统以外，尚存在一个功能上与之拮抗又与其保持动态平衡的抗凝血系统，它包括：①细胞抗凝：是指肝细胞及单核-巨噬细胞系统清除和摄取循环中已激活的凝血因子的作用；②体液抗凝：体液中存在抗凝血酶Ⅲ（AT-Ⅲ）、蛋白C（PC）、蛋白S（PS）等抗凝物质，能有效地灭活已被活化的凝血因子尤其是凝血酶；③纤维蛋白溶解系统：体内的纤维蛋白溶解酶原（纤溶酶原）可经因子Ⅻa、激肽释放酶、尿激酶、组织纤溶酶原激活物（tPA）等激活成有活性的纤溶酶，后者可使纤维蛋白（原）降解成纤维蛋白降解产物（FDP），这有助于将血液凝固限于出血部位，并在血管开始修复前清除掉凝块。
entities.entity: 抗凝血
entities.label: bod
entities.entity: 纤维蛋白
entities.label: bod
entities.entity: 细胞抗凝
entities.label: bod
entities.entity: 肝细胞
entities.label: bod
entities.entity: 单核-巨噬细胞
entities.label: bod
entities.entity: 体液
entities.label: bod
entities.entity: 体液
entities.label: bod
entities.entity: 抗凝血酶Ⅲ
entities.label: bod
entities.entity: AT-Ⅲ
entities.label: bod
entities.entity: 蛋白C
entities.label: bod
entities.entity: PC
entities.label: bod
entities.entity: 蛋白S
entities.label: bod
entities.entity: PS
entities.label: bod
entities.entity: 凝血因子
entities.label: bod
entities.entity: 凝血酶
entities.label: bod
entities.entity: 纤维蛋白
entities.label: bod
entities.entity: 纤维蛋白
entities.label: bod
entities.entity: 溶解酶原
entities.label: bod
entities.entity: 纤溶酶原
entities.label: bod
entities.entity: 因子Ⅻa
entities.label: bod
entities.entity: 激肽释放酶
entities.label: bod
entities.entity: 尿激酶
entities.label: bod
entities.entity: 纤溶酶原激活物
entities.label: bod
entities.entity: tPA
entities.label: bod
entities.entity: 纤溶酶
entities.label: bod
entities.entity: 血管
entities.label: bod