Fig. 5
From: Functional morphological study on the tongue of the adult Egyptian geese (Alopochen egyptiacus)
Light micrographs of longitudinal paraffin sections (A-E) showing structure of the apex of the geese’s tongue. Photos (A, C-E D) stained with H&E and (B) with Masson’s Trichrome. Note, the entoglossal bone (E), parakeratinized dorsal epithelium (KDE), non-keratinized dorsal epithelium (DE), parakeratinized ventral epithelium (KVE), collagenous connective tissue (f), lingual nail (Ln), Connective tissue papillae (black arrow or ctPP), Herbst corpuscles (H), central axon (a), internal capsule (blue arrow), collagenous fiber of corpuscle (star) and external capsule (red arrow)