Atlas of Human Anatomy by Netter

[Plate 359, Female Perineal Spaces]

Perineum

General organization (Same as male)

Narrow region between superior medial aspects of thigh

With lower limbs abducted in lithotomy position, becomes a diamond-shaped area

Bounded by pelvic diaphragm superiorly and superficial fascia and skin inferiorly

Anal canal, urethra, and vagina pass through the perineum

Boundaries:

Anteriorly: Pubic symphysis

Posteriorly: Inferior sacrum and coccyx

Anterolaterally: Ischiopubic rami

Laterally: Ischial tuberosities

Posterolaterally: Sacrotuberous ligaments

Divided into two triangles by imaginary line between ischial tuberosities

Posteriorly is anal triangle

Anteriorly is urogenital triangle

Contents of the anal triangle (Same as male)

Anal canal and anus

External and internal anal sphincters

Ischiorectal fossa

Contents of urogenital triangle

Membranous and distal urethra

Vagina

Vulva (labia majora, labia minora, and clitoris)

Erectile bodies of vulva

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