UCL, GRANT MUSEUM OF ZOOLOGY / SCIENCE PHOTO LIBRARY UCL, GRANT MUSEUM OF ZOOLOGY / SCIENCE PHOTO LIBRARY
Penis bones. Preserved specimens of the penis bones of a domestic dog (Canis lupus familiaris), a coatimundi (Nasua narica), a kinkajou (Poto flavus, cercoleptes caudivolvulus), and a red fox (Vulpes vulpes). The penis bone, also called the os penis or baculum, is a bone found in the penis of many mammals (but absent in humans). The bone is located above the urethra and helps maintain stiffness during sexual penetration.
Model release not required. Property release not required.