Pelvic inletAla of sacrumSacro-iliac jointCoccyxIschial spineAnterior superior iliac spineObturator foramenIschial tuberosityPubic symphysisIschiopubic ramusPubic tubercleSI body
Fig. 5.5 Pelvic walls. A. Bones and ligaments of the pelvic walls. B. Muscles of the pelvic walls.
Greater sciatic foramenLesser sciatic foramenObturator foramenSacrotuberous ligamentSacrospinous ligamentIschial tuberosityIschiopubic ramusPubic tubercleAnterior superioriliac spineMargin of pelvic inletA
Margin of pelvic inletPiriformis muscleObturator internus muscleB
Fig. 5.6 Pelvic outlet.
Ischiopubic ramusPubic symphysisIschial tuberosityCoccyxSacrotuberous ligamentPubic tubercleObturator foramenAnterior superior iliac spineAcetabulumMargin of pelvic outletSacrum
Fig. 5.7 Pelvic floor.
Fig. 5.8 Pelvic cavity and peritoneum. A. In men (sagittal section). B. In women (anterior view).
Pelvic cavity linedby peritoneumAPerineal membraneand deep perineal pouchLevator aniRectumAortaPeritoneumPelvic inletExternal iliac arteryInternal iliac artery(artery of pelvis)BladderUterusB
Fig. 5.9 Perineum. A. In women. B. In men.
Roots of external genitaliaPerineal membraneLevator aniSacrotuberous ligamentAnal triangleAnal apertureUrethral orificeUrogenital triangleVaginal orificeRoots of external genitaliaLevator aniAnal apertureAnal triangleUrogenital trianglePerineal membraneABUrethral orifice
Fig. 5.10 Areas of communication between the true pelvis and other regions. A. Between the true pelvis, abdomen, and lower limb.
B. Between the perineum and other regions.
Gap between pubic symphysis and perineal membrane• Dorsal vein of penis and clitorisSacrotuberous ligamentSacrospinous ligamentOrifices in floor• Urethra• Vagina• AnusLesser sciatic foramen• Obturator internus muscle• Pudendal nerve• Internal pudendal vein  and arteryB
Fig. 5.11 Orientation of the pelvis and pelvic cavity in the anatomical position.
Coronal planeAnterior superioriliac spinePubic tuberclePubic symphysisSacrumSacrospinous ligamentSacrotuberous ligamentAnal triangle of perineumUrogenital triangle of perineumPelvic inlet
Fig. 5.12 Structures that cross the ureters in the pelvic cavity. A. In women. B. In men.
Fig. 5.13 Position of the prostate gland.
Fig. 5.14 Dermatomes of the perineum. A. In women. B. In men.
Fig. 5.15 Pudendal nerve.
S1S2S3S4Sacrospinous ligamentPudendal nerveIschial spineAttachment of levatorani and coccygeus(pelvic floor)
Fig. 5.16 Pelvic splanchnic nerves from spinal levels S2 to S4 control erection.
Hypogastric nerveInferior hypogastric plexusAttachment of pelvic floor(levator ani and coccygeus)Pelvic splanchnic nerves(from S2 to S4)Urogenital triangleAnal triangleProstateNerves to erectile tissue
Fig. 5.17 Perineal body.
Fig. 5.18 Course of the urethra. A. In women. B. In men.