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血液在體內本為流動的液體,一旦離開身體後,很快地就變成了不能流動的、膠冻狀的物質,這種下能流動的物質稱為凝塊或血塊。如將流出體外的血液盛於一容器中,靜置片刻,不只膠冻狀的血塊可以形成,而且血塊還要皺縮;同時表面出現一层澄清徵黄色可流動的液體,就是血清。
The fluid in the body, which is a flowing fluid, quickly becomes an immobile, jelly-like substance once it leaves the body, a substance known as a clot or blood clot. If the blood will flow out of the container in a container, let stand for a moment, not only jelly-like blood clots can be formed, but also shrinkage of blood clots; the same time there is a clear layer of clarify the surface of the yellow liquid can flow, is serum.