RESPIRATORY DISEASES 



155 



Fig. 49. Skiagraph of Head and Neck of Chicken 

 A, Trachea. B, esophagus. C, vertebra. D, crop, filled with grains 



of wheat. E, infraorbital or maxillary sinus. F, frontal 

 G, feathers. IT, nostrils. I, eyes. J, musculature. 



sinus. 



