en. iv.] 



ADIPOSE TISSUE 



45 



connective-tissue corpuscles, especially the " mast "-cells ; these cells 

 may be found exhibiting every intermediate gradation between 



Fi6. 68. Blood-vessels of adipose tissue. A, Minute fat-lobule, 

 In which the vessels only are represented, a, artery; 

 v, vein ; b, the fat-vesicles '-of one border of the lobule 

 separately represented, x 100. B, Plan of the arrange- 

 ment of the capillaries (c) on the exterior of the vesicles ; 

 more highly magnified. (Todd and Bowman.) 



tissue from an eight months' foetus. 

 a, Spherical or, from pressure, 

 polyhedral cells with large central 

 nucleus, surrounded by protoplasm 

 staining uniformly with haematoxy- 

 lin. 5, Similar cells with spaces from 

 which the fat has been removed by 

 oil of cloves, c, Similar cells show- 

 ing how the nucleus with enclosing 

 protoplasm is being pressed towards 

 periphery, d, Nucleus of endo- 

 thelium of investing capillaries. 

 (M'Carthy.) Drawn by Treves. 



an ordinary granular corpuscle and a mature fat-cell. The process 

 of "development is as follows : a few small drops of oil make their 



FIG. 70. Branched connective-tissue corpuscles, developing into fat-cells. (Klein.) 



appearance in the protoplasm, and by their confluence a larger drop 

 is produced (figs. 69 and 70) : this gradually increases in size at the 

 expense of the original protoplasm of the cell, which becomes cor- 



