TOPOGRAPHY FEATURES AND STRUCTURE IMMUNE FORMATIONS OF CHICKEN’S ESOPHAGUS AT THE AGE OF 90, 120 AND 150 DAYS
Studied the topography and the feature of immune formations of the esophagus (except the esophageal tonsil area) of chickens cross Shever 579 aged 90, 120 and 150 days. In the performance of methods used histological studies. It was found that in these age groups of chickens, immune formations of cranial and caudal parts of esophagus are morphofunctional mature and submitted as single, minor accumulations of diffuse lymphoid tissue, prenodules, primary and secondary lymphoid nodules. These accumulations are registered in their own lamina and submucosal mucous membrane - under the epithelium, near the small blood vessels, secretory departments, esophageal glands and their excretive ducts. There is a migration of lymphoid cells in the surface epithelium and epithelium of the esophageal glands in places of their location. Herewith the clearance of individual departments and their secretory ducts filled with lymphoid cells. The area of immune formations in both parts of the esophagus increased from 90 to 150 days of chiken’s life and it is greater in the caudal part of the esophagus. The most intensive immune formations area increases in the cranial part of the esophagus at the age 120 to 150 days, and in the caudal part - from 90 to 120 days.