SHOULDER AND PELVIS. 



41 



Fig. 18, only directly attached to the axial skeleton by the 

 ventral ends of the collar bones, and free to make consid- 



Fm. 18. The skeleton of the trunk and the limb arches seen from the front. 

 C, clavicle ; S, scapula ; Oc, innominate bone attached to the side of the sacrum 

 dorsally and meeting its fellow at the pubic symphysis in the ventral median line. 



erable movements, as in "shrugging the shoulders." The 

 pelvic girdle, Oc, on the contrary, is firmly and immova- 

 bly attached to the sides of the sacrum. 



How is the shoulder girdle united to the axial skeleton? 

 Can it move? Give an instance? How is the pelvic attached? Is 

 it movable? 



