来自《耶鲁大学开放课程：生物医学工程探索 第25集 第25集》
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When it's exposed to the tissue outside,而一旦它暴露于外部组织 -
a series of chemical reactions gets initiated.就会启动一系列化学反应 -
That series of chemical这一系列化学反应 -
reactions is called the coagulation cascade.称为凝血级联反应 -
It involves proteins that are also enzymes其中包括一些酶蛋白 -
that go from an inactive state to an active state.由非活化状态转化为活化状态 -
This is described in the book in some detail.书里有详细的描述 -
I'm not going to ask you我不会在这其中 -
questions about the molecular details of this.那么些分子细节上为难你 -
I want you to just sort of understand the concept,只不过要你知道这个概念 -
that a protein in the blood gets activated在暴露于异物表面时 -
by exposure to a foreign surface.血液中的蛋白被激活