Download PELVIS AND PERINEUM

PELVIS AND PERINEUM
Bony Pelvis


Review bones of pelvic girdle.
Pelvic brim:
= superior outlet.
Boundaries:
Sacral promontory.
Arcuate lines.
Iliopectineal line of pubis.

Greater (false) pelvis:
= expanded area above pelvic brim.
Bony Pelvis

Pelvic outlet:
Bounded by:
Coccyx, sacrotuberous ligaments, ischial
tuberosities, ischiopubic rami, pubic
symphysis.
Lesser pelvis:
Portion of bony pelvis below pelvic
brim.
Closed below by pelvic diaphragm.
Pelvic Diaphragm

Levator ani:
Consists of:
Puborectalis:
forms a sling around
anorectal junction.
Pubococcygeus.
Iliococcygeus.
Pelvic Diaphragm

Levator ani:
Forms muscular sling supporting pelvic
organs.
Incomplete anteriorly to allow for passage of
urethra and vagina.

Ischiococcygeus.
Urogenital Diaphragm

Layer of skeletal muscle between two
layers of fascia:
Penetrated by membranous
urethra (male and female) and vagina.
Ischiorectal fossa:
Wedge-shaped space between:
Anal canal, obturator internus,
pelvic diaphragm, skin.
Perineum

Diamond-shaped area below pelvic
Diaphragm:
Same boundaries as inferior pelvic
aperture.
Divided into two triangles:
Anal triangle.
Urogenital triangle.
Viscera of Male Pelvis
Seminal vesicle.
 Ductus deferens.
 Ejaculatory duct.
 Prostate gland.
 Urethra:

Prostatic.
Membranous.
Viscera of Female Pelvis
Ovaries.
 Uterine tube (Fallopian tube; oviduct):

Infundibulum.
Ampulla.
Isthmus.
Intramural part.

Uterus:
Body.
Fundus.
Cervix.
Viscera of Female Pelvis

Ligaments:
Broad ligament:
Formed by two layers of
peritoneum.
Contains:
Uterine tube.
Round ligament of uterus.
Ligament of the ovary.
Uterine vessels.

Vagina.
Arteries of Pelvis

Internal iliac artery:
Arises from common iliac artery anterior to
sacroiliac joint.
Supplies:
Perineum.
Gluteal region.
Pelvic organs and walls.
Divided into anterior and posterior divisions.
Arteries of Pelvis

Internal iliac artery:
Anterior division:
Umbilical artery.
Obturator artery.
Inferior gluteal artery.
Internal pudendal artery.
Inferior vesical artery.
Middle rectal artery.
Uterine arteries.
Vaginal artery.
Arteries of Pelvis

Internal iliac artery:
Posterior division:
Superior gluteal artery.
Iliolumbar artery.
Lateral sacral artery.

Other arteries of the pelvis:
Ovarian artery.
Superior rectal artery.
Median sacral artery.