SECTION I 



Visceral Anatomy of the 

 Hen 



Digestiye and Genito-Urinary Tracts 



PLATE I. 



1. Beek. 2. Tongue. 3. Pharynx (throat) 

 through which the food passes to the esophagus 

 (gullett) 4. 5. The crop, a storehouse or granary 

 where the food accumulates during feeding. 6. 

 Second portion of the esophagus, through which 

 the food passes from the crop into 7, the proven- 

 triculus. 



A part of the abdominal organs are laid over 

 to the left, so that the proventriculus or true stom- 

 ach, lies over the liver. The second portion of the 

 esophagus empties into the proventriculus, or true 

 stomach, in whose walls are found secreting glands 

 similar to those of the stomach of higher animals. 



The food, after being soaked in this secretion, 

 passes into the gizzard, 8, a muscular organ, where 

 the grain and other coarse particles are ground by 

 the contractions of its muscular walls and the grit 

 which it contains. From the gizzard, the food 

 passes into the duodenum, 9. 10 represents the 

 deep (duodenal) or the first portion of the small 

 intestines, between the folds of which is located 

 the pancreas, 25, which pours its digestive secre- 

 tion into the small intestines. 11 represents the 

 floating portion of the small intestines supported 

 by the mesentery (web-like membrane) 19, which 



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