10 PERSONAL APPEARANCES IN HEALTH AND DISEASE. 



and bearing the sensory organs (which, with the jaws and 

 mouth, go to form the face), is largely bony, the soft parts 

 being very slightly developed over the head proper, but to 

 a greater degree over the face. The trunk, divisible into 

 neck, chest, abdomen, and pelvis, has its form laid down 

 in bone, which in the neck and abdomen is represented 

 in the spine only, in the chest by the ribs, which attached 

 to the spine behind and the breast-bone in front form the 

 walls of the thoracic cage in which are contained the 

 lungs and heart, with the air passages and blood-vessels 

 connected with them, as well as the gullet passing on 

 its way to the stomach. The chest cavity is separated 

 from that of the abdomen by a muscular septum, the 

 diaphragm ; and contained in the abdomen are the organs 

 of digestion, assimilation, urinary excretion, and others. 

 The lateral and front walls of the abdomen are soft and 

 pliable, being wholly composed of skin, subcutaneous 

 fat, and muscular layers. Lastly, the pelvis is flanked on 

 each side by the greatly expanded haunch-bones to which 

 the bones of the lower extremity are attached. The 

 four limbs, subdivided into segments and terminating in 

 the hands and feet, are connected to the trunk by muscles 

 and ligaments binding the joints. 



The Skeleton. The bony skeleton (Fig. i*) or frame- 



* For this and for many of the other illustrations we are indebted 

 to Mr. H. E. Cree. 



