EXPLANATION OF FIG. 2 



Digestive and Genito-urinary Tract 



1, beak; "I, tongue; 3, pharynx; 4, esophagus (gullet); 5, crop; 

 6. second portion of esophagus; 7, proventrlculus; 8, gizzard; 9, duo- 

 denum; 10, first portion- of thi small intestine; 11, floating portion 

 of small intestine; 12, ceca; 13, blind extremities of ceca; 14, colon 

 15, rectum; 16, cloaca; 17, opening of egg sac into rectum; 18, anus 

 19, mesentery; 20, opening from ureter into rectum; 21, kidney 

 22, left ovary; IJ, egg canal; 25, pancreas; 26, liver (turned back) 

 27, gall bladder; 28, spleen. 



Organs of Respiration 



29, nostrils; 30, frontal sinus; 31, maxillary (infraorbital) sinus; 

 32. turbinated bone; 33, posterior nares; 34, glottis; 35, larynx; 36. 

 trachea (wind-pipe); 37, false larynx; 38, lung. 



Organs of Circulation 



39, heart (pulled down to bring it into view); 40, aorta; 41, left 

 brachial artery; 42, cartoid artery. 



