| 摘要: |
| [目的]观察关中奶山羊胎儿皮肤及其衍生物在不同生长阶段的组织发育及生长变化.[方法]运用HE和Masson染色法以及透射电镜,对不同发育时期的山羊胎儿皮肤组织切片进行染色和观察.[结果]表皮于8～9周龄开始发育;10周龄表皮由3层细胞构成,真皮层出现胶原纤维,表明真皮层开始出现;在11周龄可见有原始毛囊出现,有少量张力原纤维存在,并发现朗格罕斯细胞;12～13周龄表皮细胞出现角化层、透明层及颗粒层的分化,可见汗腺;14～15周龄毛球上皮细胞索开始分化为外根鞘、内根鞘的原基和毛发的前体,在毛囊一旁出现皮脂腺,张力原纤维增多、变粗,并发现典型的桥粒结构;16～17周龄表皮层变薄,毛开始形成,并随着发育逐渐长出体表;18周龄皮肤结构渐趋成熟.[结论]山羊胎儿表皮的发生先于真皮发生,皮肤在胎儿期处于剧烈的分化阶段,皮肤衍生物的形成对皮肤的发生有重要作用. |
| 关键词: 奶山羊 胎儿 皮肤组织 皮肤发育 |
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| 基金项目:陕西省自然科学基金资助项目（2004C120） |
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| Histological observation on the fetus skin development of Guanzhong dairy goats |
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| Abstract: |
| 【Objective】 The experiment was conducted to observe the histological development of skin and its derivation in different growth periods of the Guanzhong Dairy Goats.【Method】 HE & Masson and transmission electron microscope (TEM) methods were carried out to dye the simple slices of fetal goatskin tissue.【Result】 The skin of goat fetus began to develop from 8th to 9th week,skin of the 10th was made up with three layers cells,folliculars appeared at the 11th week,from week 12th to 13th,skin cells began to differentiate into cuticular layers, diaphanotheca and granular layers,sweat glands formed at the same time,skin cells of hair bulb began to differentiate into the fundament of outer root-sheath and internal root sheath,and the antecedent of hairs,sebaceous gland was formed on one side of the folliculars,hair appeared and began to grow outside of the skin as the cuticular layer thinning,from 16th-17th week,the structures of skin began to grow and become mature at the 18th week.【Conclusion】 The development of goat embryonic epidermis,which differentiates exquisitely during the embryophase,is prior to that of corium.The ramification of skin is significant to the development of goat skin. |
| Key words: dairy goat fetus skin tissue skin development |
