CHAPTER yi. 



THE CHEST. 



Fig. 26. 



a The first rib. 



b The cartilages of the eleren hindermost, or fake ribs, connected together and 



uniting with that of the seventh or last true rib. 

 c The breast-bone. 

 d The top, or point, of the withers, which are formed by the lengthened spinous, 



or nprigbt process^ of the ten or eleven first bones of the back. The 



bones of the back are eighteen in number. 

 e The ribs, usually eighteen on each side ; the seven first united to the breast- 

 bone by cartilage! the cartilages of the ; remaining eleven united to 



each other, as at b. 

 f That portion of the spine where the loins commence, and composed of five 



bones. 

 g The hones forming the hip, or haunch, and into the hole at the hottom of 



which the head of the thigh-bone is received. 

 The portion of the spine belonging to the haunch, and consisting of five 



pieces. 

 The bones of the taU, usually fifteen in number. 



The chest, in the horizontal position in which it is placed in 

 the cut, is of a somewhat oval figure, with its extremities trun- 

 cated (cut off). The Spine is its roof; the sternum, or breast, 

 its floor ; the ribs, its sides ; the trachea, (Esophagus, and great 

 blood-vessels passing through its anterior extremity and the dia- 

 phragm, being its posterior. It is contracted in front, broad and 

 deep towards the central boundary, and again contracted pos- 



tcriorlv. It encloses the heart and the longs, the origin of the 

 ■' 10 ft 



