44 



ANATOMY FOR NURSES. 



[CHAP. IV. 



ring or aperture between these two ; hence it is often termed 

 the "strait." The bony pelvis is a basin without a bottom. 



J.UESg&RD. 



FIG. 47. THORAX. 1 to 12, ribs ; d, d, costal cartilages; e, upper end of sternum; 

 6, middle portion of sternum ; la, first dorsal vertebra ; 12a, twelfth dorsal verte- 

 bra; 7a, seventh cervical vertebra; 1 to 7, true ribs; 8 to 12, false ribs; 11, 12, float- 

 ing ribs. 



The opening where the bottom ought to be is the inferior strait 

 or outlet. The female pelvis differs from that of the male in 

 those particulars which render it better adapted to parturition, 

 notably in being altogether wider in every direction, which 

 gives more room for the child to pass ; in being altogether shal- 



