Review Article

The Chick Chorioallantoic Membrane: A Model of Molecular, Structural, and Functional Adaptation to Transepithelial Ion Transport and Barrier Function during Embryonic Development

Table 2

A schematic view of the functional roles of the allantoic epithelium.

FunctionsSites and mechanismsMolecular componentsReferences

Ion and H2O reabsorption from the allantoic fluidAllantoic epithelial cells [7, 14, 93]

Proton secretion towards the allantoic fluid and bicarbonate reabsorptionMitochondria-rich cellsVacuolar H+-ATPase [21]
Carbonic anhydrase [21, 28]
AE1 anion exchanger [30]

Defence against luminal toxic contentsGranule-rich cells-secretionGlycoconjugates rich in sialic acid and 𝛼 -fucose residues [29]