Japanese Lamprey (lampetra Of Japonica) Digestive Tissue Study

Anatomical, histological, histochemical and electron microscope methods were used on preliminary studies on the form, the histological structure, the histochemistry and the ultrastructure of Lampetra japonica.Morphological studies tell us that the digestive tract of Lampetra japonica is a pipe, relatively short, being 0. 745 times as long as its body, 1. 186 times as long as its body cavity. Because of the life style specialization Lampetra japonica has no lingual. The oesophagus is only a brief pipe between pharynx and intestine. Typhlosole is preset in intestine. There are muscle and connective tissue around buccal gland. The liver has only one lobe, present long triangle, flaky and colour is filemot, dark brown and fuchsia. There is no gall bladder. Fatty tissue is in panceas and the fore-intestine.Histological studies tell us that there is stratified cuboidal epithelium in the fold epithelium of oesophagus mucosa, and transitional epithelium in the bottom of the fold. The fore, mid- and hind- intestine epithelium is single-layered columnar epithelium. Intestinal gland exists. There are lots of dense cilia in the epithelium. The lobulation is not so distinct in the liver. The endocrine pancreas consists of different size and various shape cell masses. The secretory epithelial of the buccal glands is consist of high columnar cells, and the cells contain numerous granules, some of which are zymozgen-like.Histochemical studies tell us that in the sections stained with mecury-bromophenol blue, abundant blue protein inclusions are present in the cavity of buccal glands. In the sections stained with periodic acid-Schiff Daddi, abundant carbohydrate is present in intestine and liver. In the sections stained with Daddi' alcohol sudan III, fat is present in connect tissue of intestine, liver and the epithelial of the buccal glands. The more close to free end of the cell, the more abundant fat is present in cells. The fat in the epithelial of the buccal glands may correlate with secretory.Ultrastructure studies tell us that the cilia in the epithelium are the same as the one in the intestine of lower vertebrates. Abundant cell organs are in the cells of intestine and liver. Intestinal gland exists. The secretory...