ADIPOSE TISSUE 



559 



is very highly developed in long-necked animals such as 

 the horse. The vocal cords of the larynx are also com- 

 posed of this tissue. 



It consists of the elastic fibres of areolar tissue, now 

 arranged in dense, more or less parallel, bundles. The 

 fibres are sufficiently thick to show a well-marked outline. 

 They also frequently branch into finer fibres, and when 

 teased out the broken ends 

 of the fibres are character- 

 istically curled (Fig. 184). 



(iv.) Adenoid, Retiform 

 or Lymphoid Tissue. — As 

 already described (p. 90) the 

 functionally essential parts 

 of a lymphatic gland are 

 composed of this tissue, and 

 it permeates the "pulp" of 

 the spleen, although here it 

 is in a somewhat modified 

 form. 



Adenoid tissue is a simple 

 network of branching fibres 

 (see Fig. 30) whose substance 

 IS nearly identical with that 

 of the collagenous fibres of 

 areolar tissue, but has some 

 affinities to that of elastic 

 tissue. 



(v.) Adipose Tissue. — This tissue is the ordinary 

 "fat" found in many parts of the body. It consists 

 simply of areolar connective tissue in which the connective 

 tissue corpuscles are present in vast numbers and contain 

 neutral fat, composed of a mixture of stearin, olein and 

 palmitin. These modified cells are held together by a 

 vascular framework furnished by the connective tissue to 

 which they belong. 



The cells are at first indistinguishable from ordinary 



Fio. 184.— Elastic Fibres teased 

 oot and magnified about 200 

 Diameters. (Sharpev.) 



