50 TISSUES 



of which are the functionating cells of the glands. 

 The cells of this variety are mostly stellate. 



5. The Mixed or Areolar Tissue. This contains 

 both white and elastic tissue. It shows a net-work 

 of fine white fibrils, with elastic fibrils scattered 

 throughout, and they are usually branched. The 

 cellular elements scattered among these fibrils are 

 stellate, plasma, and wandering forms. Areolar tissue 

 is very fine, delicate, loose in texture, and binds the 

 skin to the underlying fasciae, and lies between muscles. 



6. Adipose or Fatty Tissue. This is white fibrous 

 tissue, in which fat cells are deposited. In the living 

 body it is liquid at the temperature of the body. It 

 can only be seen in the tissues under the microscope 

 after special preparation. It is essential to know, how- 

 ever, that it is found and can be seen as a yellowish 

 layer beneath the skin (postmortem), surrounding 

 organs, etc., which act as a covering or protection to 

 them; it has a wide distribution and is never found in 

 the ear, eyelid, or genitalia (male), and is always found 

 back of the eye-ball and in the kidney, no matter how 

 poorly nourished an individual may be, even to the 

 extent of starvation. 



7. Lymphoid Tissue. This is made up of a net-work 

 of reticulum, holding among its fibers the white blood- 

 cells or leukocytes. The cells seen are mostly small 

 lymphocytes, and some large lymphocytes and poly- 

 nuclear cells. (See blood, page 221.) There are three 

 varieties of lymphoid tissue: (a) diffuse; (b) solitary 

 follicles; (c) Peyer's patches; and lymph nodes. 



(a) The diffuse variety is found in the tunica propria 

 of the mucous membrane of the alimentary and respir- 

 atory tracts, the medulla of the thymus body, and 

 the greater portion of the tonsil and spleen. (6) 

 Solitary follicles are found in the alimentary and 

 respiratory tracts, spleen, and tonsils. (c) Peyer's 

 patches consist of a collection of solitary follicles clearly 

 outlined from the surrounding tissue. They are found 



