Fig. 15From: Functional morphological study of the choana in different bird speciesPhotomicrograph of a transverse section of choanal gland, a in kestrel with Alcian blue PH2, b in common moorhen with Alcian blue PH2, c in hoopoe withAlcian blue PH2, d in kestrel with Alcian blue PH1, e in common moorhen with Alcian blue PH1, f in hoopoe with Alcian blue PH1, and g in common moorhen with Alcian blue PHBack to article page