FCJiTAL NUTRITION: THE PLACENTA 



461 



body in an age-series of pregnant rabbits from the fourteenth day 

 to the end of pregnancy. The maternal placenta was separated 

 mechanically from the fostal placenta, and each was investigated 

 separately. Tlie maternal part includes the two glycogenic areas. 



Jp 



LP. 











'1 







r.5 





ss 



Fig. 131. — Cilycogenic ai'eas of the lubbit's placenta at the twelfth day of 

 pregnancy. (Chipman.) 



fp, Fct'tal placenta, containing no glj'cogen ; ii; inteimediary region ; r.i, 

 legion of uterine sinuses ; ss, uterine sinuses with perivascular sheaths 

 of uninucleate cells rich in glycogen ; g, glycogen granules in multi- 

 nucleate cells ; III, musoulai' wall immediately aloove which, at a later 

 date, the zone of separation, containing glycogenic decidual cells, is 

 differentiated. 



tlie region of the uterine sinuses and the zone of separation. The 

 foetal part includes the peniusuhc of decidual tissue which form the 

 intermediary zone; the glycogen contained in it belongs wholly to 

 these peninsula' and I'epresents the fi'action most intimatelj' I'elated 

 to the tr(jphol>last. It ma)- on that account lie termed the 'proximal 

 glycngeu, while that of the maternal part is the distal glycogen. On 



