STRUCTURE OF THE HUMAN BODY SKELETON. 



of the skull. This canal contains the spinal 7/iarroiv, which is con- 

 nected with the brain 

 through the hole in 

 the skull. All the 

 vertebrae are very 

 firmly joined toge- 

 ther. Nevertheless 

 it is always very 

 wrong to lift children 

 by the head, as is 

 sometimes done, for 

 they are liable to be 

 killed on the spot. 



At the level of the 

 chest the vertebrse 

 form a support for 

 the ribs, which ex- 

 tend forward and 

 meet against a bone 

 placed under the 

 skin, and called the 

 sternum or breast- 

 bone. . There are 

 twelve ribs on each 

 side. Every human 

 being, therefore, ~h as 

 twenty-four ribs. 



The hips are formed 

 by a kind of com- 

 plete bony girdle 

 which is called the 

 pelvis. The shoulder 

 is formed of two 

 bones, the clavicle, or 



collar-bone in front, 

 Skeleton of Man. 



