1 — Deep transverse perineal muscle; 2 — Levator ani; 3 — Symphysial surface; 4 — Rectus abdominis; 5 — Obturator internus; 6 — Pectineus; 7 — Rectus femoris; 8 — Anterior inferior iliac spine; 9 — Sartorius; 10 — Anterior superior iliac spine; 11 — Internal oblique; 12 — Transversus abdominis; Transverse abdominal; 13 — Iliacus; 14 — Iliolumbar ligament; 15 — Quadratus lumborum; 16 — Erector spinae; 17 — Interosseous sacro-iliac ligament; 18 — Posterior superior iliac spine; 19 — Auricular surface; 20 — Sacro-iliac joint; 21 — Levator ani; 22 — Sacrospinous
ligament; 23 — Sacrotuberous ligament
