Some Histological and Histochemical Study of the Esophagus in One-Humped Camel (Camelus dromedarius)

The aim of this research has been described some histological and histochemical changes of muscle fiber of normal esophagus of the one-humped camel (Camelus dromedarius). Twenty camels were used for the present studies. The mucosal epithelium was keratinized stratified squamous and there were abundant submucosal glands throughout the esophagus. The tunica muscularis of the esophagus showed stratified muscle in two general layers. The results of the esophageal histochemistry in this study revealed that the type 2 muscle fibers predominated in both cervical and thoracic portions of the esophageal musculature and the proportion of type 1 muscle fiber was low in the cervical esophagus and increased in the thoracic esophagus. This study provides some details about histological description of the normal esophagus in dromedary camel that can be used as a basis for further studies of esophageal malfunction in this species.