INANITION OF THYIiOII) IN RATS 



309 



minute structure of the gland, but some of the essential features 

 especially affected by inanition will be considered briefly. 



Fig. 2 A small ijortioii of the thyroid slaiid shown in figure 1 irat S 9.47, age 

 22 days) magnified to sliow tlic ddails of the normal histological structure. Sev- 

 eral follicles containing colloid aic sliown. Follicular epithelium cuobidal; cy- 

 toplasm alMiudant and granular, with a few scattered vacuoles. A])i)arent ori- 

 gin of tlie colloid 'vacuoles" from the ejjithelial cells is shown in a few places. 

 Four intcrfollicular e])ithclial cells ai-e seen between the two lower follicles. 

 Fibrous st I'oma scanty, witli ricli bloo(i-\ ascular ])le\us. IX ToO.) 



THE AMi;ui(:.\N .loruN.vi. of axato.my, vol. 19, no. 



