Gatskivs'kyj V. Morphology of esophagus and extension of esophagus of domestic poultry.

The paper, on the grounds of complex examinations (anatomical, histological, morphometric, statistical), determines a structural organization of esophagus and extension of esophagus of clinically healthy, adult poultry of six types (chicken, quail, turkey, ducks, geese and ostriches). By the results of histological examinations we determined, that a microscopic structure of esophagus of poultry with a different type of feeding has a similar histoarchitectonics, but differ by morphometric indexes. For instance, the biggest thickness of the wall of the organ in a neck sector, which depends on the surface of the internal envelope: between the line of mucous membrane it is smaller, in the sector of lines - bigger due to the extension of all layers (aside from the epithelium layer). The muscular coat of esophagus of poultry includes an internal circular and external lengthwise muscular layers. Though, floated poultry (ducks, geese) have no external lengthwise muscular layer. The grain poultry and ostrich have the internal circular muscular layer of much bigger than internal lengthwise one. The obtained data give more obvious presentation regarding to morphogenic peculiarities of the development of esophagus and extension of esophagus with different type of feeding on the organic and tissue levels.