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. Author manuscript; available in PMC: 2014 Jul 1.
Published in final edited form as: Anat Rec (Hoboken). 2013 May 8;296(7):10.1002/ar.22708. doi: 10.1002/ar.22708

Fig. 4.

Fig. 4

Scanning electron micrographs of an adult mouse penis, distal end-on view. Seen end-on the urethral orifice is Y-shaped with the ventral cleft being the ventral stem of the “Y.” The MUMP, which is projecting toward the viewer, is dorsally situated and is continuous laterally with the MUMP ridge. Thus, the MUMP plus the MUMP ridge demarcate the urethral orifice. The MUMP ridge is demarcated peripherally by the circumferential MUMP ridge groove (small black arrows in b). The MUMP Ridge is almost completely bisected by a ventral cleft. In addition, the MUMP Ridge has several minor clefts (White arrows in c). Attached to the lateral wall of the Y-shaped urethra are the distal termini of bilateral erectile bodies called the MUMP corpora cavernosa (MUMP CC). Scale bars = 200 μm for a and b, 100 μm for c.