Eyeball walls Cornea 1 /6 Fibrous layers Sclera 5/6 Choroid 2/3 Eye ball vascular layers Ciliary body rIs Retina 6
6 Ciliary body Eyeball Walls Fibrous layers Eye ball Vascular layers Retina Cornea 1/6 Sclera 5/6 Choroid 2/3 Iris
D C B ornea M Colorless, transparent 5 layers: epithellum Bowman’ s membrane Stroma Descemet’ s membrane Cornea H&E Low endothelium E· corneal epithelium;D· Descemet membrane :b- Bowman s membrane P-substantia propria
7 Cornea Colorless, transparent 5 layers: epithelium Bowman’s membrane Stroma Descemet’s membrane endothelium
keratin Cornea a epithelium: Non-keratinized stratified squamous epi. 5-6 layers Numerous mitotic figures B No vessels Free nerve ending b. Bowman's membrane( anterior Corneal epithelium H&E High arrows-lens fibers(young); basement membrane) P-substantia propria; B-Bowman's membrane An accellular homogeneous membrane (collagen fibrils Stability strength, no regeneration
8 Cornea a.epithelium: ◼ Non-keratinized stratified squamous epi. ◼ 5-6 layers ◼ Numerous mitotic figures ◼ No vessels. ◼ Free nerve ending b.Bowman’s membrane( anterior basement membrane) ◼ An accellular homogeneous membrane (collagen fibrils) ◼ Stability & strength, no regeneration keratin
C Stroma or substantia propria Several lamellae of fine collagen f network Flattened fibroblasts G.S. richin chrodroitin sulfate D. Descemet's membrane (posterior limiting lamina) D Acellular homogeneous membrane M Can be repaired by endothelial cells K E Endothelium Cornea h&E Med Like mesothelium in its morphology E- corneal epithelium; D-Descemet's Regulate the water content of the membrane:b- 's membrane. stroma> maintain transparency P-substantia propria; K-keratocyte
9 C. Stroma or substantia propria ◼ Several lamellae of fine collagen f.network ◼ Flattened fibroblasts ◼ G.S.rich in chrodroitin sulfate D. Descemet’s membrane (posterior limiting lamina) ◼ Acellular homogeneous membrane ◼ Can be repaired by endothelial cells E.Endothelium ◼ Like mesothelium in its morphology ◼ Regulate the water content of the stroma → maintain transparency
胶原板层电镜图 相邻胶原板 层的纤维方 向垂直 胶原板层 纵断面 胶原板层 横断面 10
10 胶原板层电镜图 相邻胶原板 层的纤维方 向垂直 胶原板层 纵断面 胶原板层 横断面