Fig. 14From: Functional morphological study of the choana in different bird speciesPhotomicrograph of a transverse section of choanal gland, a in kestrel with PAS-Alcian blue, b in hoopoe with PAS, c in common moorhen with PAS, d in kestrel with bromophenel blue, e in common moorhen with bromophenel blue, and f in hoopoe with bromophenel blueBack to article page