ADIPOSE TISSUE. 295 



goes as has been stated (p. 291) in case of ligation of the large 

 arteries, since they lie under the deep fascia, which does not vary in 

 thickness, and require a division of the superficial fascia to arrive 

 at the latter. 



10. Reparative new formations of areolar tissue have already been 

 described (p. 292). Pathological new formations are not infrequent; 

 often constituting, as they do, the stroma of cancerous growtns, in 

 the areolas of which the cancer-cells are deposited. It is, however, 

 often very difficult to decide, in particular instances, whether a pa- 

 thological new formation consists mainly of the white fibrous or of 

 the areolar tissue, on account of its imperfectly -developed state; and 

 some of the formations mentioned on page 283 would by some ob- 

 servers be regarded as of the areolar, rather than of mere collagenous 

 tissue. 



CHAPTER Y. 



ADIPOSE TISSUE. 



ADIPOSE tissue and fat, are terms often used to denote the same 

 thing. But we have seen that human fat is a fluid a compound 

 of oleine, margarine and stearine ; the first holding the other two 

 in solution (p. 76, 1). It is also found constituting in part the gran- 

 ules in almost all kinds of cells (epithelial, &c.), and in the form of 

 minute drops (fat globules), in the interstices of many tissues (p. 

 73). 



But in adipose tissue, the fat is contained in, and completely fills 

 the adipose cells ; and the tissue consists of the two following ele- 

 ments: 



I. The adipose, or fat-cells. 



II. A matrix of areolar tissue diffused among the cells, 

 and holding them together the intercellular areolar 

 tissue. 



I. The adipose cells (Fig. 185), are peculiar in several respects. 

 1st. They contain no granules; but only the clear fluid before men- 

 tioned. 2d. When fully developed, they have no apparent nucleus 

 or nucleolus ; though Kolliker always finds a nucleus when they 

 are but partially filled. 3d. The cell-wall is apparently of simple 



