AND PHYSIOLOGY. 



23 



yellow fibers are about T sVoth of an inch in diameter and form 

 a part of the larynx, and the middle coat of the arteries. 



69. Areolar Tissue. — The areolar tissue consists of fibers 

 of white and yellow tissue interwoven, so as to leave irregular 

 spaces, or areolae, between them. This tissue originates from 

 cells, as is shown in Fig. 16. The areolar tissue is more widely 

 diffused than any other in the body, so that if it were possi- 

 ble to remove all but this one, the form of the part would be 

 preserved. It surrounds all the arteries and veins, the nerves, 

 muscles and internal organs ; and it forms one of the layers of 

 the skin and mucous membrane. 



70. One of the layers of the skin, of the mucous membrane, 

 and the serous and synovial coat that lines the shut cavities of 

 the body, is composed of interwoven fibers of simple basement 

 membrane , and of one or more layers of cells upon the free 



Fig 15. 



Fig. 1G. 



2. The Fibro-Cellular Membranes, 



69. What is the composition of areolar tissue? What of its abundance in the bodyf 

 Where is it principally found ? 70. Describe the fibro-cellular membrane, 



2 



