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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Your Position :Home->Past Journals Catalog->2011 Vol.30 No.2

Histological Observation of the Digestive System of Bufo tibetanus
Author of the article:ZENG Lin1 , LIU Shao-long* , WANG Ning-ning
Author's Workplace:( Key Laboratory for Bio-resources and Eco-environment , Ministry of Education , College of Life Sciences , Sichuan University, Chengdu 610064)
Key Words:Bufo tibetanus; alimentary tract; alimentary glands; histology
Abstract:The digestive system of Bufo tibetanus has been histologically studied. The results show that the alimentary tract consists of the buccal cavity, pharynx, esophagus, stomach, duodenum, ileum, and rectum; the alimentary glands include the liver and the pancreas. The stomach wall is composed offour layers, which are the mucosa, submucous, muscularis,and serosa. Gastric glands are abundant in the mucosa, but the neck and the body of the gastric gland are not evident. The muscular layer is better developed than the others, composed of circular muscle and longitudinal muscle. The intestine wall is made up of four layers, which are the mucosa, submucous, muscularis,and serosa, but the submucous is absent at the duodenum. There are many tubular intestinal glands in the lamina propria. The liver is divided into three lobes which are left, middle and right lobes, and the boundaries of the hepatic lobules are not distinct. The acinus of the pancreas is surrounded by acinus cells.
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