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Nasal epithelia, alligator (labels) - TEM

This is a histology slide from an American alligator. Low magnification of olfactory epithelium. Long slim supporting cells are filled with electron-lucent vesicles (vs). Note the area at the distal portion of the cell (asterisk) where vesicles are mostly absent. The surface of the supporting cells is covered with small microvilli. OSNs (olfactory receptor neurons) are rare (arrows).

vs - vesicles; n - nucleus; arrows - olfactory receptor neurons.

Image courtesy of:
Hansen, Anne; "Olfactory and solitary chemosensory cells: two different chemosensory systems in the nasal cavity of the American alligator, Alligator mississippiensis"; BMC Neuroscience 2007 8:64 doi:10.1186/1471-2202-8-64.

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