本文报道用10例胎龄7～10个月的新生儿鼓膜及听小骨,用10％福尔马林液固定,用以作组织学及织组化学观察。发现鼓膜的表皮层系从外耳道皮肤延续而来,由1～2层扁平上皮细胞构成,直接与纤维层紧密相连,位于槌骨柄及鼓环的表皮层逐渐增厚到4～5层。表皮层移行到外耳道后,逐渐出现皮钉、真皮乳头及真皮层。纤维层位于表皮层和粘膜层之间,由胶元纤维构成。纤维层分两层,外层为 This article reports the use of 10 cases of gestational age 7 to 10 months of neonatal eardrum and ossicles, fixed with 10% formalin, for histological and weave chemical observations. It was found that the epiretinal layer of the tympanic membrane extends from the skin of the external auditory canal and consists of 1 to 2 layers of flat epithelial cells and is directly connected to the fibrous layer. The epidermis located on the shank and the drum ring gradually thickens to 4 to 5 layers. After the epidermis migrates to the external auditory canal, gradually appear nails, dermal papilla and dermis. The fibrous layer is located between the epidermis layer and the mucosal layer and consists of collagen fibers. The fiber layer is divided into two layers, the outer layer is