鹅生长发育过程中小肠绒毛形态发育的扫描电镜观察

Scanning Electron Microscopic Observation on the Morphological Development of Geese Small Intestinal Villi

为探究鹅个体发育过程中小肠绒毛形态发育情况,通过扫描电子显微镜对鹅胚胎发育过程中和成体的小肠绒毛进行形态学观察。结果表明:鹅胚胎时期,小肠绒毛经历了由山脊状黏膜褶发育为“W”形板状黏膜嵴最后变为指状绒毛的过程;出雏后,鹅小肠绒毛形态由指状变回板状。其中,鹅胚胎发育18 d后(胚胎发育的60%阶段后),小肠表面黏膜由山脊状黏膜褶变为规则的“W”形板状黏膜嵴。发育25 d后(胚胎发育的83.3%阶段后),板状黏膜嵴均变为指状绒毛。鹅胚孵出8 d后小肠指状绒毛开始变扁,17 d龄鹅的小肠指状绒毛变成板状绒毛,成体鹅一直保持板状绒毛形态。

To investigate the morphological development of small intestine villi during the development of geese,the morphological observation of the small intestinal villi during the embryonic development of the goose and the adult was performed by scanning electron microscopy.The study found that during the goose embryo period,the small intestinal villi experienced a process from ridge-shaped mucosal folds to develop into“W-shaped”plate-shaped mucosa and finally became finger-like villi.After hatching,the shape of the small intestine villi changed from fingers to plate.Among them,after 18 days of goose embryo development(after the 60%stage of embryonic development),the mucosa on the surface of the small intestine changed from ridge-like mucosal folds to regular“W-shaped”plate-shaped mucosa.After 25 days of development(after the 83.3%stage of embryonic development),the plate-shaped mucosa became finger-like villi.The small intestine finger villi began to flatten after the goose embryo hatched for 8 days,and the small intestine finger villi of 17-day-old goose became plate-shaped villi,and the adult goose kept the shape of plate-shaped villi.