Male external genitalia and perineum

Bulb of penis, left bulbospongiosus muscle reflected

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Image #167-1

Male external genitalia and perineum

Bulb of penis, left bulbospongiosus muscle reflected

The left bulbospongiosus muscle has been reflected to expose the underlying corpus spongiosum and its posterior enlargement into the bulb of the penis. The inferior fascia of the urogenital diaphragm (11) is visible in the deep part of the dissection.

1. Body of penis
2. Corpus spongiosum of penis
3. Bulbospongiosus muscle
4. Inferior pubic ramus
5. Crus of penis
6. Ischiocavernosus muscle
7. Perineal artery
8. Ischial tuberosity
9. Ischiorectal fossa
10. Branch of perineal nerve that passed through bulbospongiosus muscle to communicate with posterior scrotal nerves (see 166-3)
11. Inferior fascia of urogenital diaphragm (perineal membrane)
12. External anal sphincter muscle
13. Internal pudendal artery
14. Deep (Buck's) fascia of penis
15. Bulbospongiosus muscle (reflected)
16. Left pointer: Bulb of penis Right pointer: Crus of penis
17. Nerve to bulbospongiosus muscle