OSSEOUS SYSTEM. 195 



Of the Medullary System. 



Q. What is the disease of this tissue? 

 A. That which is usually termed spina ventosa. 

 Q. What is spina ventosa? 



A. It is a " tumour arising from the clevelopment of the 

 bone and increase of its fleshy granulations." 

 Q. Where is spina ventosa never known? 

 A. It is never found in the short flat bones. 



