AND PHYSIOLOGY. 



37 



































a-. 

 ?.v .• 







S>-: 









sification, begins at Fig. 35. 



certain points, and 

 continues until the 

 whole is completed 

 as is seen in the 

 Fig. 36. In some of 

 these bones there is 

 but one of these 

 centers, or points, 

 w here ossification 

 commences, while in 

 the Sphenoid there 

 are 12. 



97. Number of 

 Bones. — The num- 

 ber of bones in the 

 human system is 

 reckoned differently 

 by different anatom- 

 ists since many of 

 the bones are well 

 exhibited only in 

 hard working or 

 well developed mus- 

 cular subjects. The 

 number 246 will be 

 given in this book 

 as taken from Eras- 

 mus Wilson, whose 

 work on Anatomy is 

 adopted as the text 

 book in nearly all the medical schools of this country. This in- 

 cludes the teeth, and sesamoid bones, of which the latter are not 

 constant in every individual. They are summed up as follows : 



Section of cartilage near the point of ossification. 

 1, ordinary appearance of cartilage. 2 and 3, more ad- 

 vanced stages of ossification. 1', 2' and 3' portions 

 1, 2 and 3 more highly magnified. 



97. What is the number of bones in the human body ? Give the different groups. 



