CHAPTEK II 



THE REPRODUCTIVE ORGANS IN THE 

 HIGHER ANIMALS 



The organs of reproduction in man and other mammals occupy 

 the floor of the pelvis which consists of the bony ring with its 



Fig. 6. — Pelvis of man ; anterior aspect. (From Gnu/s Anatomi/.) 



contained cavity at the hind end of the body. The sacrum 

 which is formed by the fusion of the sacral vertebrae constitutes 

 the roof of the pelvis, and the os innominatum which consists 

 of three bones on each side — the ilium (or hip bone), ischium, 

 and pubis joined together — forms the floor and sides of the pelvis. 

 On its outer surface and where the three constituent bones unite 

 the OS innominatum presents a cu})-shaped cavity known as the 

 acetabulum where the femur or thigh bone articulates with it. 



IS 



