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《Fisheries Science》 2004-05
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Types and Distribution of Mucous Cells in the Digestive Tract in Abalone Haliotis discus hannai Ino

WANG Yi-yan, SUN Hu-shan, ZHENG Mei-yu (College of Life Science, Yantai Normal University, Yantai 264025, China)  
Types and distribution of mucous cells in the digestive tract were studied in abalone Haliotis discus hannai Ino with average body length of 73 mm by combined alcian blue and periodic acid Schifts reaction procedure (AB-PAS). The mucous cells were divided into four types according to the color: typeⅠ, pure red; typeⅡ, pure blue; type Ⅲ, purple reddish; type Ⅳ, blue purple. There were many mucous cells in the epithelia around the mouth, most of which were large cup-shaped typeⅡ, and a few type Ⅳ. A plenty of mucous cells, especially typeⅡ, appeared in the epithelia of buccal mass and radula sac. In the esophagus, it was found that the number of the mucous cells decreased from the anterior to posterior gradually. There were more cup-shaped and circle mucous cells, mainly typeⅡ, in the distal intestine than those in the proximal one. Many circle mucous cells, predominantly typeⅡ,were found in the inner and outer epithelia in the rectum, while no mucous cells were observed in the stomach caeca and the stomach.
【Fund】: 国家“973”计划资助项目 (G19990 12 0 0 5 ) ;; 山东省中青年学术骨干资助项目
【CateGory Index】: S917
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