Lab 7 Structures Revealed

Gluteal Region

Bony Structures 

Ischial spine

Ligaments

Sacrotuberous ligament

Sacrospinous ligament

Spaces

Perineum

Vessels

Superior gluteal a. and v.

Inferior gluteal a. and v.

Internal pudendal a. and v.

Muscles

Gluteus maximus m.

Gluteus medius m.

Gluteus minimus m.

Piriformis m.

Superior gemellus m.

Inferior gemellus m.

Obturator internus m.

Quadratus femoris m.

Bulbospongiosus m.

Ischiocavernosus m.

Nerves

Superior gluteal n.

Inferior gluteal n.

Posterior cutaneous nerve of the thigh

Sciatic n.

Pudendal n.

Male Urogenital Triangle

Shaft of the penis:

• • Superficial penile fascia (continuous with Scarpa’s and Dartos fascia; devoid of fat tissue)

  • Deep penile fascia (Buck’s fascia)

  • Tunica albuginea forms the septum penis, which separates the corpora cavernosa

  • Corpora cavernosa (paired structures) 

  • Corpus spongiosum

Glans penis

Penile raphe

Bulb of the penis

Superficial Perineal Space:

• • Ischiocavernosus m.

  • Bulbospongiosus m

  • Superficial transverse perineal m.

Female Urogenital Triangle

External Genitalia- Perineum

Mons pubis

Labia majora

Labia minora

Vestibule

Clitoris

External urethral orifice

Vaginal orifice

Anus

Shaft of the Clitoris

Tunica albuginea

Corpora cavernosa (paired structure)

Superficial clitoral fascia

Bulb of the vestibule (corpus spongiosum)

Superficial Perineal Space:

• • Ischiocavernosus m.

  • Bulbospongiosus m

  • Superficial transverse perineal m.

Clinical Correlation

Diversity in external genitalia