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. 2012 May 3;2012:960159. doi: 10.1100/2012/960159

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Copyright © 2012 I. Bravo Portela et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Transmission electron microphotographs of different types of side secretory cells (a–d) and subepithelial glands (e–g). (a) The characteristic secretory granules of the type C remain outside the cell, forming the mucus (mu). Type A with partially secreted granules can be observed. Bar: 5 μm. (b) Basal region of the type C cell showing a body with tightly packed membranes below the nucleus (n) Bar: 2 μm. (c) Detail of latter microphotograph showing a prominent rough endoplasmic reticulum (r) between nucleus (n) and the body. Bar: 0.2 μm. (d) A Type D cell with swirled membranous vesicles and a type A cell. Bar: 3 μm. (e) Subepithelial multicellular gland with a well-developed Golgi complex (g) and dense secretory granules associated. Bar: 2 μm. F. Detail of the Golgi complex (g) in the subepithelial multicellular gland. Bar. 0.5 μm. (g) Subepithelial unicellular gland. Bar: 2 μm.