VISCERAL ANATOMY OF THE HEN 17 



larynx, 35, through the opening (glottis) 34. From 

 the larynx the air passes through the trachea 

 (windpipe) 36. At 37 there is a flattened portion, 

 the false larynx, provided with vocal cord-like 

 structures — the organ of sound. Just below this 

 point is the bifurcation (branching) of the trachea, 

 one branch going to each lung. 38. Left lung. 



Organs of Circulation 



The heart, 39, is illustrated pulled down, to bring 

 it into view. 40. Main artery (aorta) leading 

 from the heart. 42. Carotid artery, a branch of 

 the aorta, supplying the neck and head. 41. Left 

 brachial artery, a branch of the aorta, supplying 

 blood to the left wing. 



