THE VERTEBRATE BODY 



311 



Nasal foramen 

 Suture 

 Brain case 

 Optic foramen 



Auditory capsules 



Atlas 



Pectoral girdle 

 Vertebra 

 Transverse process 



Upper jaw 

 Lower jaw 



I 



§Qq) Carpals 



Phalanges 

 Metacarpals 



Radio-ulna 

 Humerus 



Tibio - fibula 



Tarsals 

 Metatarsals 



Phalanges 



Fig. 22.3. Dorsal view of the skeleton of the frog. The hind leg has been somewhat 

 shortened in proportion to the rest of the body. 



Although the human skeleton is considerably more complex than 

 that of the frog, it is built on the same fundamental plan. Even when 

 a bone found in the frog appears to be missing in the human skeleton, 

 a study of young human skeletons will usually reveal it. The brain 

 case in man is tremendously enlarged to make room for our highly de- 

 veloped brain. The relative size and shape of many of our skull bones 



