ANATOI\rY OF THE FOWL 



27 



larger than the left, in most birds, except in the turkey and 

 guinea, where they are of equal size. The liver lies behind 

 the heart, the apex of which extends into the fissure between 

 the anterior portion of its two lobes. The inferior surfaces 



t-^ 



Fig, 6. Transverse Section Through the Thoracic 

 Region, Looking Backward. 



No. 1, spinal cord; 2, esophagus; 3, trachea; 4, skin; 

 5, pectoral muscles; 6, lungs; 7, heart; 8, breastbone; 

 10. liver. 



of the liver are convex and covered by a layer of visceral 

 peritoneum. The two lobes are held together by a small ligar 

 ment. A filiform ligament extends from the inner surface 

 of the sternum and becomes lost in the serous covering of 



