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免疫系统由体内具有特殊抗感染作用的细胞和分子组成。其功能是识别外源性和自身物质 ,并中和、清除和同化异物 ,保护自身组织免受损伤。机体的防御体系包括天然免疫和获得性免疫。前者作用迅速 ,通过许多途径和机制来保护自己免受微生物和有害物质的侵袭。后者起效慢 ,但具有?
The immune system consists of cells and molecules that have a specific anti-infective effect in the body. Its function is to identify extrinsic and own substances and to neutralize, eliminate and assimilate foreign objects and protect their own tissues from injury. The body’s defense system includes natural immunity and acquired immunity. The former has a rapid effect and protects itself from microorganisms and harmful substances through many ways and mechanisms. The latter effect is slow, but with?