176 OSSEOUS SYSTEM. 



these bones are found in the spinal column, and in the 

 hands and feet. 



Q. How does their number give solidity or strength ? 



#. The bands requisite to unite them are so frequent 

 and strong as to produce these effects. 



Q. And how does their number give mobility? 



*ft. Their individual motions tend to communicate ge- 

 neral mobility. 



Q. What is their general appearance ? 



*ft. They are very rough, with cavities and eminences 

 for their articulations, for their muscles and ligaments. 



Q. What is their internal structure? 



*ft. They are almost entirely cellular. 



Q. What influence has this structure on the diseases of 

 these short bones? 



#. It renders them liable to frequent caries. 



Q. What is the general name of the bony eminences? 



ft. They are usually denominated apophyses. 



Q. What do you mean by epiphyses? 



<ft. They are points of bony eminence, which are not 

 entirely united to the principal bone by calcareous union; 

 epiphyses are united to the bone by cartilage. 



Q. How are the bony eminences divided? 



#. Into four classes; those of articulation, of insertion, 

 of reflection, and of impression. 



Q. What are attached to the eminences of insertion ? 



#. The fibrous organs exclusively, such as ligaments, 

 tendons, &c. 



Q. Where do you find these eminences of insertion 

 most conspicuous? 



#. In strong men, in carniverous animals. The size 

 of these protuberances indicates the strength of the animal. 



