Histochemical study of proventriculus in pre-hatch and post-hatch days in northern bobwhite quail (Colinus virginianus)

The present study was designed to investigate the histochemical developmental changes of proventriculus at pre-hatching and post-hatching in northern bobwhite quail periods 11- 15-days addition 14- 21-days post-hatching. composed four tunics is tunica mucosa, sub-mucosa, muscularis, serosa. mucosa lined with simple columnar epithelium height increases age also thickness submucosa filled proventricular glands 21-day post-hatch gland diameters while 15-day pre-hatch less diameter sub does not fill gland. Tunica muscularis thicker than pre-hatch, 15- day a thin inner circular layer thick outer longitudinal but middle layer. give positive reaction for Alcian blue stain weak moderate periodic acid Schiff gives negative stains.