Fig. 314. Types and development of bone. (A) Compact and cancellous (spongy) 

 bone. (B) Diagram showing structure of compact bone. (Redrawn and slightly modi- 

 fied from Maximow and Bloom, 1942, A Textbook of Histoloi-y, Philadelphia, Saunders.) 

 (C) Stages in conversion of marrow canal or space of spongy bone into an Haversian 

 system by deposition of concentric layers of bony lamellae. (D) Haversian systems 

 of compact bone from thin, ground section. (Redrawn and modified from Bremer, 1936, 

 Textbook of Histology, Philadelphia, Blakiston.) 



660 



