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                                                Oviduct, mouse (labels) - SEM
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                                                Scanning electron micrograph of the ampulla of the oviduct of a mouse.  The epithelium of the tunica mucosa is simple columnar and contains two types of cells: (1) ciliated; ciliary beating causes caudad fluid flow, to move the oocyte  toward the uterus; (2) non-ciliated secretory cells termed "Peg cells"  
 
Image courtesy of OSU College of Veterinary Medicine.  Copyright © Charlotte L. Ownby. Reprinted with permission. 
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