PEIR Digital Library

Welcome to the Pathology Education Informational Resource (PEIR) Digital Library, a multidisciplinary public access image database for use in medical education.

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ELECTRON MICROSCOPY: GASTROINTESTINAL: GI: COLON: Colonic gland (crypt of Lieberkuhn). (EM-labeled); RCH/P&SC9, transverse section of one crypt showing release of secretion (mucus) from a goblet cell into the lumen of the crypt. 1-15-absorptive epithelial cells, L-lumen of crypt, G-goblet cell