48G 



lialpli II. Major. 



with their blood-supply intact. They resemble, to use the classi- 

 •cal Malpighian expression, a cluster of grapes, over which arte- 

 ries and veins can be seen twining about. These arteries of the 

 fourth order run over the surface of the lobules and give off fol- 



FiG. 9. 



Tk; 



Fig. «. — Siugle follicle of liuiuan thyroid dissected out, sliowiug its follicular 

 artery A, and follicular vein V. X 85. 



Fig. 9. — Single follicle of liuuiau tliyroid dissected out, sliowiug a follicle 

 receiving its blood-supply from its own follicular artery A, and also from 

 the follicular artei'y supplying an adjacent follicle A'. 



V. — Follicular vein. X 85. 



licular arteries to each follicle. The follicular arteries end in a rich 

 capillary network which surrounds each follicle. The vein which 

 arises from this capillary network upon the far side to the artery, 

 follows fairly closely the course of the artery 



Figs. 8 and 9 show 



