马冈鹅肠胚后发育的组织学观察

Histologic Observation of Intestine in Postembryonal Development in Magang Goose

将72只5～110d马冈鹅(♂♀各半)按不同日龄随机分为9组,先后取十二指肠、空肠、回肠和直肠,应用常规组织学技术和Tiger细胞图像分析系统进行观测.结果表明:各部肠管管壁分粘膜、肌层和浆膜三层,无粘膜下层;绒毛既有分支,也有融合现象;肠腺主要是单管状腺,但也有分支管状腺;粘膜上皮中柱状细胞从前向后逐渐减少,而杯状细胞则相应逐渐增多;肠腺中的柱状细胞则由前向后逐渐增多,杯状细胞相应减少;肌层分内纵、中环、外纵三层,内、外两肌层厚度近似,中环肌最厚,内有明显的结缔组织间隔带分布,小肠段呈有规律的'竹节'状;粘膜皱襞不发达,少数皱襞由粘膜、内纵和中环肌层共同构成;肠壁内淋巴组织丰富,在肌层之间及肌层内均可见淋巴小结,肌层内也有神经丛和神经纤维束的断面;绒毛高度发育的绝对生长高峰期在26d以前,但绒毛直径的发育无明显的阶段性.

Using rontine histologic technology and Tiger cellular image analysis system,the microstructures of intestines of 72 Magang geese in different development stages(5-110d) were observed.The results were as follows:(1)The wall of intestine consisted of three layers,mucous membranne,tunica muscularis and serous membranne,no submucosa. (2)Both the branch and the mergence intestinal villus could be observed in the mucous membranne,and intestinal glands were made by simple and branched tubular gland.(3)In macula epithelium,the number of the columnar cells decreased gradually from duodenum to intestinum rectum,while the goblet cells increased.But in intestinal gland,these were adverse.(4)The muscular tunic could be classified as inner longitudinal,middle circular and outer longitudinal.the middle circular muscular was the thickest muscular layer and contained some intervale of connective tissue. (5)The pure growth peak of villus' height was in 26d before,but the diameter of villus was no difference in different development stages.