Espiral Atlas
OrganPelvis and perineum

Internal urethral sphincter

musculus sphincter urethrae internus

At the neck of the male bladder, around the internal urethral orifice.

Pelvis and perineum – 3D human anatomy atlas

In the full entry

The full entry, with every field, sources, quiz and clinical correlations, is in the atlas.

  • Structure
  • Innervation

Other structures in this region

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