CONTENT OF ENDOCRINE CELLS IN GUT OF GEESE UNDER FEED DEPRIVATION
Data on the content of endocrine cells APUD system in the gastrointestinal tract of humans and animals, accumulated to date show significant individual variations in their number. The results of the experimental research of the influence of feed deprivation on the content of endocrine cells of APUD-system in gut of Large Grey 8-month age geese are presented in the article. Grimelius reaction was used to estimate the total number of endocrinocytes (argirophilic cells) of intestine mucose, Masson-Hamperl, modified by Singh, was used to estimate the population of argentaffin cells(enterochromaffin Ec-cells). It has been found out that apud cells are in the small intestine, mainly in the a lower third part of a crypt towards rectum - along their whole depth and in the epithelium of villus. Endocrynocytes lie on the basal membrane, their large light nucleus stock to the central part of the cell, the cytoplasm contains the granules of dark brown color. Most of argirophilic cells belong to the «close» type. With the increase in the period of feed deprivation the total population of endocrine cells (argirophilic cells) gradually reduces: in the duodenum by 6.47 times, in jejunum - by 6.87 times, in ileum - by 4.76 times, in caecum - by 6.12 times and in rectum - by 9.97 times. As there is a decrease in the total number of endocrinocytes the population of argentaffin cells reduces more intensively: in the duodenum by 14.45 times, in jejunum - by 22.71 times, in ileum - by 15.91 times, in caecum - by 17.5 times and in rectum - by 22.43 times. The decrease in the number of the endocrinocytes revealed seems to reflect the process of their degranulation and the active role of hormones and bioamines that are synthesized by them including serotonin in the compensatory-adaptive reactions under the influence of feed deprivation.