Fig. 9From: Functional morphological study of the choana in different bird speciesHigh magnification of ventral surface of skull of hoopoe shows the maxillary process of the palatine bone (Map), maxillopalatine process (MP), vomer bone (arrow) is absent and replaced by a longitudinal ribbon of collagenous connective tissue, choana fossa (Fc), ventral crest (Vc), ventral fossa (Vf), Pterygoid (Pt), and parasphenoid (Sph). Upper right, photomicrograph of a transverse section of roof of hoopoe shows the collagenous connective tissue. (Masson’s Trichrome)Back to article page