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International Journal of Morphology

On-line version ISSN 0717-9502


ZHU, Lei et al. Histological Observation of the Stomach of the Yellow-billed Grosbeak. Int. J. Morphol. [online]. 2013, vol.31, n.2, pp.512-515. ISSN 0717-9502.

The stomachs of the yellow-billed grosbeaks were examined by means of light microscopy. The mucous membrane of the proventriculus presented many folds and sulci. The sulci were lined by simple columnar cells with basal nuclei and clear acidophilic cytoplasm. The proventriculus glands were constituted by many round or elliptical glandular lobules. The sulci and the collecting duct of compound tubular glands showed an intense positive reaction in PAS and AB stain. The gizzard was characterized by an internal abrasion-resistant lining cuticle and a thick muscular layer. The cuticle, gizzard glands and muscular layer in two sides were thicker than those in the cranial and caudal.

Keywords : Yellow-billed Grosbeak; Proventriculus; Gizzard; Histology.

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