FGETAL NUTRITION: THE PLACENTA 429 



Hubrecht ^ has suggested that erythrocytes may be manu- 

 factured in the decidual cells, and their iron-containing granules 

 may thus be utilised (see p. 494). 



Fat Metabolism. — Regarding the presence of fat in the 



Fig. 103. — Iron granules in the placenta of the rabbit at the eighteenth day 

 of pregnancy. (Chipman.) 



o, iron granules in mesoblast ; 6, iron granules in multinucleate decidual 

 cells ; g, iron granules in ectodermal tubules. 



' Hubrecht, "Ueber die Entwicklung der Placenta von Tarsius und 

 Tupaja," Intemat. Oongr. of Zool., Cambridge, 1898. 



