16 (iKXKKAl. 8TBUCTURE OF THE BODY. 



in the walls of the air tubes, in (lie ligaments of the 

 spine, etc. 



Fiiltij or W///JO.XT ttNtiuc is formed by the deposit of fat 

 in the cells of the areolar tissue and is found in most 

 pails where the areolar tissue occurs, though it varies 

 largely in amount in different parts. It is found pretty 

 generally under the skin, fills in inequalities about vari- 

 ous organs and about the joints, and exists in large quan- 



*, 



2* 



d-^ :-i^V-'^. ' -' 



~ 



FIG. 3. Adipose tissue (Leroy): a. Fibrous tissue; 6, fat cells; c, nucleus of 

 fat cells; d, fatty acid crystals in fat cells. 



titles in the marrow of the long bones. In moderate 

 amounts it gives grace to the form and constitutes an 

 important reserve fund. 



Cartilage consists of groups of nucleated cells in inter- 

 cellular substance. It is very firm, yet highly elastic, and 

 serves in the joints to break the force of concussion of the 

 harder and less elastic bones. Except when it occurs at 

 the end of a bone, it is covered with a membrane called 

 the perichondrium, which carries its blood supply. In 

 the nose, ear, larynx and trachea it serves to give shape, 

 to keep the passages open, and to afford attachment for 



