5- 







Am ore-posterior 



(Sympbysis to tip of coccyx.) 

 Transverse 



(Between tuberosities.) 



ii cm. 



Fte. 47. THE PELVIS. INLET, 



>R STRAIT. ($ 



i. Iliac fossa; 2, crest of ilium; 3, anterior-superior spine of ilium; 4, anterior- 

 inferior spine of ilium; 5, ilio-pectineal joint; 6, 7, body and symphysis of pubes; 

 S, acetabulum; o, tuber of isrhnim; 10, n, pubic arch: i:. spines of isclv. 

 coccyx; 14, saooOiac joint; 15, is placed just above the promo: . 



-- : -- : ' ' . -I".. .i:s 



early in the second month. 



The nucleus for the pubis appears 

 about the end of the fourth month 

 -The nucleus for the ischium appears 

 in the thud month 



FIG. 48. THE PELVIS of A FETUS AT BIRTH. TO SHOW THE THREE PORTI 

 THE COKAL BOXES. (Morris.) 



THE DORSAL AXD VENTRAL CAVITIES OF THE BODY 



By articulation of the bones of the head and trunk a framework 

 is formed for two cavities, within which are situated the internal 

 organs or viscera. (These delicate and important parts must be 

 provided with surrounding structures which insure both their 

 safety and efficiency.) 



