1 — Coccyx [coccygeal vertebrae CoI-CoIV]; 2 — Anococcygeal body; Anococcygeal ligament; 3 — Obturator fascia; 4 — Inferior fascia of pelvic diaphragm; 5 — Ischial tuberosity; 6 — Perineal fascia; Superficial investing fascia of perineum; Deep perineal fascia; 7 — Perineal body; 8 — Bulbospongiosus; 9 — Ischiocavernosus; 10 — Perineal membrane; 11 — Superficial transverse perineal muscle; 12 — Obturator internus; 13 — Gluteus maximus; 14 — Levator ani; 15 — External anal sphincter; 16 — Intergluteal cleft; Natal cleft
