THE RIBS 



99 



The internal surface is concave and presents the subcostal groove near its 

 inferior border. Tlie groove is best marked near the angle, and lodges the inter- 

 costal vessels and nerves. The ridge limiting the groove above is continuous witli 

 the inferior border of the neck of the rib; its gives attachment to the hitniuil 

 intercostal muscles. 



Fig. 108.— The Sevexth Rib of the Left Side. (Seen from lielow.) 



SUBCOSTAL GR03VE 



ARTICULAR PORTION 

 OF TUBERCLE 



STERNAL END FOR COSTAL CARTILAGE 



The superior border is rounded, and affords attachment to the internal and 

 external intercodal muscles. The inferior border commences abruptly near the 

 angle, and gives attachment to the external intercostal muscles. 



The sternal end of the shaft is cupped for the reception of tlie costal car- 

 tilay-e. 



