Urethral Crest is situated in -

Urethra -        Length o   Male- 20 cms o   Female- 4 cms -        Shortest part of the male urethra- Membranous part -        The longest part of the male urethra- Penile urethra -        Location of sphincter urethrae- Membranous part -        Prostatic urethra o   Widest part o   Most dilatable part o   Concave anteriorly. o   Route- downwards & forwards. Exit prostate slightly anterior to its apex. o   Crescentic on the cross section o    Structures on the posterior wall §  Urethral crest §  Colliculus seminalis (verumontanum) §  Opening of ejaculatory ducts §  Prostatic sinuses with the opening of prostate glands o   Lymphatics §  Membranous part- Internal iliac nodes §  Prostatic part- Internal iliac nodes §Penile urethra- Deep inguinal nodes.