ox SUPRARENAL BODIE« IX THE MOÜSIv 1^35 



rom the main mass of the proliferated cell«, while a small portion 

 may be left behind, which .seems linally to disappear without eDterin<i- 

 into the formation of the suprarenal bodies. 



T o b u m u p : 



1 . T h e M e d u 1 1 a a n d t h e cortex are distinct in their 

 o r i g i n . 



2. T he CO r t i c al b 1 a s t e m a a p p e a r s in t li e later stage o f 

 the 11th day of gestation, as a proliferation of the perito- 

 n e u m at t h e angle o f t h e m e s e n t e r y a n d laterally continu- 

 ous with the beginning of tlie generative organ. The 

 separation from this connection is complete on the 13th 

 day. 



o. The medulla is derived from the sympathetic 

 t! 1 e m e n t s , w h i c li enter the o r g a n in t h e 1 4 1 h d a y e m Ij r y o . 

 They i n crease a n d f o r m a reticulate d mass at the n entre, 

 from which the cortical cells are gradually pushed aside. 

 The connection with the sy nipathe t ic sy s tem is usually 

 cut toward the close of gestation, but in some may be 

 re t a i n e d until a f t e r birth. 



