232 



COMPARATIVE ZOOLOGY 



great development of the intercellular substance, while 

 the cells themselves are very slightly modified. 



(2) Connective Tissue. This is the most extensive tissue 

 in animals, as it is the great connecting medium by 



which the differ- 

 ent parts are held 

 together. Could 

 it be taken out 

 entire, it would 

 be a complete 

 mold of all the 

 organs. It sur- 

 rounds the bones, 

 muscles, blood 

 vessels, nerves, 

 of the ligaments 



FIG. 200. Connective Tissue, showing areolar structure. 



and glands, and is the substance 



and tendons, and forms a large portion of "true skin," 



FIG. 201. Connective Tissue from human peritoneum; highly magnified; a, blood vessel 



