CONNECTIVE TISSUES 



FIG. 44. FAT CELLS FROM A TEASED PREPARATION 

 OF ADIPOSE TISSUE OF MAN. X 110. 



flava, and in the ligamentum nuchae of quadrupeds. In these 

 locations it occurs in considerable quantity and has a peculiar 



yellowish color; it is for 

 this reason that it is fre- 

 quently described as yellow 

 elastic tissue. 



Adipose Tissue (fatty 

 tissue, fat}. Wherever 

 areolar tissue occurs, adi- 

 pose tissue may also be 

 found ; its distribution is 

 therefore identical with 

 that of areolar tissue. It 

 forms a considerable mass, 

 panniculus adiposus, be- 

 neath the skin of many 

 parts ; in it are embedded 

 the kidneys, adrenals, and 

 many lymphatic nodes; the mesentery and omentum are freely 

 supplied with fat. The same tissue is found in the grooves of the 

 heart wall, and it also occupies the spaces of the mediastinum. 



Adipose tissue 

 is composed of lob- 

 ules or groups of fat 

 cells which are sup- 

 ported by fibrous 

 bands and septa 

 and are abundantly 

 supplied with small 

 blood-vessels. 



The fat cells 

 arise from the con- 

 nective tissue cells 

 by a deposit of fat 

 droplets within the 

 cytoplasm of the lat- 

 ter. These droplets 

 continue to increase 

 in number and fuse 

 with each other to form globules of increasing size, until the 

 cytoplasm finally becomes so excavated as to form a mere limiting 



FIG. 45. ADIPOSE TISSUE. 



The fat cells have been blackened by osmium tetroxid. 

 x 110. 



