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Table 2 Morphological evidence of iron transfer: hemophagous zones.

From: Comparative aspects of trophoblast development and placentation

Placental Type Species Hemophagous zone
Synepitheliochorial Sheep, goat Base of fetal villi
Endotheliochorial Dog and cat Marginal
  Mustelids Central
  Sac wing bat Base of fetal villi
  Elephant Lateral area of placental band
  Shrew Trophoblastic curtain
Hemochorial Tenrecs Central
  Otter shrews Central off labyrinth
  Hyena Junctional zone