Male external genitalia and perineum

Deep perineal space (continued).

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Image #168-5

Male external genitalia and perineum

Deep perineal space (continued).

The internal pudendal artery has been divided and removed, together with the artery of the bulb, to reveal more completely the muscles within the deep perineal space. The proximal part of the spongy urethra (4) has been opened.

1. Crus of penis (cut off)
2. Corpus spongiosum of penis
3. Duct of bulbourethral gland
4. Spongy part of urethra (opened)
5. Bulbospongiosus muscle
6. Bulbourethral gland
7. Bulb of penis (dissected)
8. Central tendon of perineum
9. Ischiocavernosus muscle
10. External anal sphincter muscle
11. Upper pointer: Dorsal nerve of the penis Lower pointer: Dorsal artery of penis
12. Dorsal vein of the penis
13. Pubic arcuate ligament
14. Transverse perineal ligament
15. Obturator internus muscle (visible through obturator membrane)
16. Obturator nerve
17. Inferior pubic ramus
18. Sphincter muscle of urethra
19. Internal pudendal artery (cut off)
20. Perineal artery
21. Posterior border of urogenital diaphragm
22. Deep transverse perineal muscle