| 李家洲,李桂芬,贺华丽,蒙绍权,贝永建,谢文海.2009.版纳鱼螈消化道解剖学和组织学观察.动物学杂志,44(6):96-102. |
| 版纳鱼螈消化道解剖学和组织学观察 |
| Anatomical and Histological Observation of Digestive Tract in the Ichthyophis bannanicus |
| 投稿时间：2009-05-14 修订日期：2009-08-31 |
| DOI： |
| 中文关键词: 版纳鱼螈 消化道 解剖学 组织学 |
| 英文关键词:Yunnan Caecilian (Ichthyophis bannanicus) Digestive track Anatomy Histology |
| 基金项目:广西自然科学基金项目(No.桂科自0832285) |
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| 中文摘要: |
| 对我国特有珍稀濒危两栖动物版纳鱼螈(Ichthyophis bannanicus)的消化道进行解剖和组织学观察。结果表明,版纳鱼螈消化道呈直管状,无盘曲;胃、肠分化明显,肠可分为十二指肠、空肠、大肠和直肠;黏膜上皮食管为复层柱状纤毛上皮,胃后段为单层柱状上皮,直肠为复层扁平上皮,其余均为复层柱状上皮;口咽腔黏膜含大量巨型杯状细胞,有单泡状颌间腺;食道中下段有团泡状食道腺;胃体部含大量单管状胃腺;十二指肠和空肠有单泡状肠腺,绒毛发达;口咽腔的黏膜下层不明显,食道和直肠的黏膜下层为疏松结缔组织,其余均为细密的结缔组织;肌层除口咽腔为骨骼肌外,其余均为内环外纵两层平滑肌,其中,在十二指肠和空肠的两肌层间有细密的结缔组织连接。 |
| 英文摘要: |
| The anatomical and histological characters of the digestive track of Ichthyophis bannanicus,an endangered Amphibia species in mainland China,have been observed in detail. The digestive tract of I.bannanicus is a straight tubular but not a coiling structure. The differentiation is clear between the stomach and the intestine,and the latter is divided into duodenum,jejunum,large intestine and rectum. The epithelium is stratified columnar rather than stratified columnar ciliated in oesophagus,simple columnar in stomach,and stratified squamous in rectum. Numerous large goblet cells and some simple acinar intermaxillary glands lay in the mouth epithelium. The oesophagus in the lower segment contains agglomerate and acinous oesophageal glands. The stomach corpora contains masses of simple tubular gland. The duodenum and jejunum have simple acinous intestinal glands,and the villi are developed. The submucosa of the oesophagus and rectum is loose connective tissue,the oral-pharyngeal cavity is not obvious,and the rests are close connective tissue. Besides the muscular layer of oral-pharyngeal cavity is skeletal muscle,while the rests are inner circular muscle layer and the outer longitudinal muscle layer. The two muscular layers of duodenum and jejunum are connected by close connective tissue. |
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