154 



HUMAN ANATOMY. 



cartilages are short and pointed. There is occasionally a projection downward 

 from the fifth, at its most dependent point, which articulates with the sixth. Usually 

 there is a similar projection on the latter for the seventh. The eighth, ninth, and 



Clavicular 

 facet 



First rib- 

 cartilage 



Sterno- 

 hyoid 



Sterno- 

 thyroid 



Fig. 178. 



Interclavicular notch 



MANUBRIUM 



Pectoralis 

 major 



BODY 



Triangularis 



sterni 



ENSIFORM 

 CARTILAGE 



Diaphragtn 

 (sternal portion) 



Posterior Anterior 



Surfaces of sternum with coossified ensiform cartilage. 



Sterno- 

 mastoid 



Rectus 

 abdominis 



Obliguus externus 

 and transversalis 



tenth cartilages have usually their chief connection with the one above, not through 

 their ends, but through similar facets. As to direction : the first cartilage descends, 

 the second is horizontal, the third rises very slightly, and the fourth is the first to fall 

 and then rise. This change of direction occurs in each to the ninth or tenth carti- 



