1 — Anus; 2 — Levator ani; 3 — Gluteus maximus; 4 — Obturator fascia; 5 — Sacrotuberous ligament; 6 — Fascia; 7 — Ischial tuberosity; 8 — Superficial transverse perineal muscle; 9 — Deep transverse perineal muscle; 10 — Bulbo-urethral gland; 11 — Perineal raphe; 12 — Dartos fascia; Superficial fascia of scrotum; Dartos muscle; 13 — Corpus spongiosum penis; 14 — Bulbospongiosus; 15 — Ischiocavernosus; 16 — Gracilis; 17 — Perineal fascia; Superficial investing fascia of perineum; Deep perineal fascia; 18 — Ischio-anal fossa; 19 — External anal sphincter; 20 — Anococcygeal body; Anococcygeal ligament; 21 — Coccyx [coccygeal vertebrae CoI-CoIV]
