Merck Manual

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Pelvic urethra, bull
Pelvic urethra, bull

The ventral aspect of the pelvic urethra opened to view the colliculus seminalis, which is located on the dorsal aspect of the pelvic urethra just caudal to the neck of the bladder. Normal orifices of the right and left excretory ducts are shown as longitudinal slits on the colliculus seminalis.

Courtesy of Dr. Donald R. Monke.