Urogenital triangle

The urogenital triangle is the anterior part of the perineum. In female mammals, it contains the vulva, while in male mammals, it contains the penis and scrotum.

Urogenital triangle
Muscles of the female perineum. (Urogenital triangle is roughly equal to top half of diagram.)
Muscles of male perineum. (Urogenital triangle is roughly equal to top half of diagram.)
Details
Identifiers
Latin	regio urogenitalis
TA98	A01.2.06.003
TA2	279
FMA	20348
Anatomical terminology

Structure

The urogenital triangle is the area bound by a triangle with one vertex at the pubic symphysis and the two other vertices at the iliac tuberosities of the pelvic bone.

Components

As might be expected, the contents of the urogenital triangle differ greatly between the male and the female. Some of the components include:

• Posterior scrotal nerves / posterior labial nerves
• Urethra
• Vagina
• Bulbourethral gland / Bartholin's gland
• Muscles
  • Superficial transverse perineal muscle
  • Ischiocavernosus muscle
  • Bulbospongiosus muscle
• Penile crura / clitoral crura
• Bulb of penis / vestibular bulbs
• Urogenital diaphragm
• Muscular perineal body
• Superficial and deep perineal pouch
• Blood vessels and lymphatics

Additional images

• 
  Articulations of pelvis. Anterior view.
• 
  The superficial branches of the internal pudendal artery.
• 
  The posterior aspect of the rectum exposed by removing the lower part of the sacrum and the coccyx.

See also

• Anal triangle
• Genitourinary system

External links

• Anatomy photo:41:01-0201 at the SUNY Downstate Medical Center - "The Female Perineum: Boundaries of the Female Perineum"
• perineum at The Anatomy Lesson by Wesley Norman (Georgetown University) (perineumboundaries)