ELEMENTS OF HISTOLOGY 



[Chap. V. 



turn form lobides ; these again become lobes, and 

 these make continuous masses. Each group and 

 lobule has its afferent arteriole, one or two efferent 

 veins, and a dense network of capillaries between ; 

 each mesh of the capillary network holding one, 

 two or three fat cells. (Fig. 49.) Such are the 



Fig. 28. From a Preparation of the Omentum of Guinea-pig. 

 a, An artery ; v, vein ; c, young capillary blood-vessel ; d, fat cells. (Atlas.) 



nature and arrangement of fatty tissue in the sub- 

 cutaneous and submucous tissue, in the serous and 

 synovial membranes, in the intermuscular tissue, in 

 the loose tissue connecting organs or parts of organs. 



It can be shown that fat cells are derived from 

 ordinary connective tissue cells. In some places 

 both in the embryo and adult the protoplasm of the 

 connective tissue corpuscles growing in size becomes 

 filled with small oil globules, which, increasing in 

 numbers, become fused with one another to larger 

 globules ; as their size thus increases the cell nucleus 

 becomes shifted to the periphery; ultimately one 



