Rectum
Plate370
Ischio-analFossae
Ureter
Extraperitoneal
(supralevator) space
(fibrofatty tissue)
Fat body of
ischio-anal
fossa
Deeper part
Superficial
(peri-anal) part
Transverse fibrous septum
of ischio-anal fossa
Submucous space (internal venous plexus)
Peri-anal space (external venous plexus)
Intersphincteric groove (anocutaneous line)
Internal anal sphincter muscle
Conjoined longitudinal muscle
External anal sphincter muscle
Rectal fascia
Peritoneum (
cut edge
) forming floor of pararectal fossa
Levator ani muscle and superior and
inferior fascia of pelvic diaphragm
Sacrogenital fold (uterosacral
in female)
Tendinous arch of levator ani muscle
Ischial
tuberosity
Pudendal canal
(Alcock’s) contains
internal pudendal
vessels, pudendal
nerve, and
perineal nerve
Obturator
internus
muscle and
fascia
Iliopectineal
line
External
iliac
vessels
Iliacus
muscle
and fascia
Sigmoid
colon
See±also±
Plates 296
,
±
388
±
