The Essentials of Poultry Raising 



63 



Fig. 24. The digestive and respiratory tracts of the fowl: 1, tongue; 

 2, first portion of esophagus; 3, crop; 4, proventriculus ; S, gizzard; 6, 

 duodenum or small intestinal loop; 7, free portion of the small intes- 

 tine ; 8, large intestine or rectum ; 9, mesentery or web supporting the 

 intestine; 10, caeca or blind pouches; 11, cloaca; 12, anus; 13, pancreas; 

 14, liver; IS, spleen; 16, larynx; 17, trachea; 18, lung. 



