Study On Histological Structure Of Digestive Glands Outside Of The Digestive Duct In Alpacas

Alpaca was imported in China as economic animal. In order to study the histological structure of the digest system, the microstructure and submicrostructure of the digest gland that three salivary glands: parotid gland, submandibular gland and sublingual gland, liver hepar and pancreas were observed. The results show as follows: 1. Observed by microscope, parotid gland is as the same as that of other ruminants, it is serlus gland, made up of serous cells. Observed by transmission electron microscope, at the side of the nucleolus of serous cells have a vacuole, which is not same as other animals. 2. Submandibular gland is mixed gland, is made up of serous cells and mucus cells, and most are mucus alveoli. 3. Sublingual gland is mixed gland, is made up of serous cells and mucus cells, and most are mucus alveoli. 4. Connective tissues of liver hepar are not developed, so the edge of the hepatic lobule is not distinctive. Organells are rich in Hepatocyte. Endothelial cells, Kupffer's cells and fat storing cells of the hepatic sinusoid were observed by transmission electron microscope. 5. Exocrine pancreas is made up of serous cells. Observed by transmission electron microscope pancreatic island is made up of three kinds of cells: A cell, B cell and D cell. The electron density of the secretory granule of A cell and D cell are different, but the electron density of the secretory of B cell is higher. Between the secretory granule of A cell B cell D cell and the edge there are air space.