Anatomical and histological study of esophagus in geese (Anser anser demesticus)‎

الملخص EN

Esophagus of geese was tubular organ situated at right side of the body.

it was divided into, cervical and thoracic part, the cervical part longer than thoracic part. The length of cervical part ,crop, thoracic part were recorded and the mean and S.D.

was founded: 16.

4, 1 .35cm ; 7.3,1.06cm ; 3.83, 0.57cm respectively.

The crop was merely enlargement fusiform in shape which located at the entrance of the thorax.

The esophagus parts showed that composed of four layer, the mucosa, sub mucosa, muscular and serosa.

The mucosal layer was thickened in the thoracic part than the crop and constituted by thick nonkertenized stratified squamous epithelium, lamina propria and mucous glandsThe mucous glands and nodular lymphatic tissues in was rich in thoracic part.

The sub mucous layer was no evidence and composed of loose connective tissues, the muscular layer constituted by circular inner and longitudinal extra.Serosa layer composed of connective tissue, collagen and elastic fibrous.