机体通过表皮与外界接触 ,而粘膜的面积比皮肤大 2 0 0倍 ,加之缺乏角质 ,所以是由外界入侵的以微生物为主的异物容易入侵的部位 ,是机体防御中重要的组织。粘膜上皮下的粘膜固有层内存在着淋巴细胞集合部位 ,形成一定程度上独立于全身免疫机构之外的固有免疫组织 ,担负着防御 The body through the epidermis and the outside world contact, and mucosal area than the skin 2 0 0 times, combined with the lack of keratin, it is invading from the outside world of microorganisms prone to invasion of foreign body parts, the body’s defense is an important organization. Mucosal epithelial lamina propria exists within the lamina propria of the lymphoid cells to form a certain degree of independent of the body’s immune organs outside the inherent immune organization, responsible for the defense