162 



ANATOMY OF THE DOMESTIC FOWL 



esophagus here is above and to the right of the inferior larynx, and 

 directly below and between the lungs. The inferior larynx is 

 above the base of the heart. 



Figure 42 shows a transverse anterior section made at n of Fig. 

 33. It shows that at this level the esophagus is centrally lo- 

 cated and passes over the base of the heart. The heart occupies 



FIG. 44. Transverse section through the body of a hen at 12, Fig. 34. R, 

 Right side. L, Left side. I, Spinal cord. 2, Articular surface of vertebral seg- 

 ment. 3, End of rib. 4,. Lungs. 5, Proventriculus. 6, Liver showing Glisson's 

 capsule. 7, Sternum. 8, Pectoral muscles. 9, Skin. 



the lower portion of the thorax and the lungs the upper. Figure 

 43 shows a photograph of a transverse anterior section of the body 

 made at 13 of Fig. 34. At this level the apex of the heart lies 

 within the anterior fissure of the liver. The sectioned portion of 

 the heart shows the lower portion of the ventricle. 



In this figure the lungs show, on the sectioned surface, the ends of 



