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Seminal plugs within the lumen of the urethra in a male guinea pig (C porcellus). The acellular coagulum is within the lumen. (HE stain, 20× magnification).
(Courtesy of D. R. Reavill, DVM, DABVP (Avian and Reptile & Amphibian Practice), DACVP, Carmichael, CA).
