MORPHOLOGICAL FEATURES OF THE GLANDULAR STOMACH AND DUODENUM OF BIRDS OF DIFFERENT TROPHIC GROUPS

Abstract

The article presents the results of a long-term study anatomical and histological characteristics of the digestive tract wild birds various trophic specialization. Representatives of polyphages, entomophages and phytophages in the autumn period were studied. In autumn, the diet of birds fully corresponds to trophic specialization. This is due to the presence and easy availability of various food components. During the study, the histological features of the structure the tubular digestive organs were clarified. They are associated with the predominance of plant or animal components in the diet the objects study. Such features include the proliferation of the mucous membrane in polyphagous birds. There is an increase in muscle elements in the wall of organs in herbivorous birds. These and other characteristics have been studied on a sufficiently large number of individuals. Therefore, it is possible to draw a conclusion about the reliability of the indicators.