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                                                Tongue, cat - histology slide
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                                                Micrograph of a cat tongue. Note the the skeletal muscle in the tongue runs in three planes. (A) horizontal plane or x direction; (B) vertical plane or y direction and (C) plane in z direction -into and out of screen.  
 
Histology image courtesy of OSU College of Veterinary Medicine.  Copyright © Charlotte L. Ownby. Reprinted with permission. 
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