Comparative electron microscopy of the placental junctional zone.
D000818:Animals; D002335:Carnivora; D002417:Cattle; D006168:Guinea Pigs; D000882:Haplorhini; D006654:Histology, Comparative; D006736:Horses; D006801:Humans; D008854:Microscopy, Electron; D010920:Placenta / Q000166:cytology*; D013194:Staining and Labeling