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Magnum

simple ciliated cilindric epithelium with goblet cells
nucleus of a ciliated cell
nucleus of a goblet cell
cilia
basal body line
magnum gland in secretion stage
pyknotic nucleus of a glandular cell

Detail of the lining epithelium and glands in the magnum of a pigeon (HE)

On this micrograph, the glands are in the secretion phase, just before egg passage: the nucleus is lying basally and is pyknotic. The cytoplasm stains strongly eosinophilic due to the presence of many granules. The lumen and the lining between the cells is hardly visible.