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Abstract
1. Morphological and histochemical observations were done on the chicken anterior and posterior lingual glands. Histology, ultrastructure and glycoconjugate histochemistry were investigated by means of light and electron microscopy using staining specific for complex carbohydrates.
2. In the anterior lingual glands there are lateral and medial zones showing different morphological and tinctorial features. The secretory cells are typical mucous cells.
3. Histochemical reactions revealed the presence of acidic glycoconjugates with terminal sialic acid residues, and glycoconjugates vicinal diol and sulphate groupings in the secretory granules.
4. It is suggested that the main functions of lingual glands are the lubrication of boli and protection from micro‐organisms.
