Sphincter urethrae is present in-
Correct Answer: Membranous urethra
Description: 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.
Category:
Anatomy
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