Dissection of female pelvis froma lateral approach

Sphincter ani externus muscle, close-up view

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Image #159-6

Dissection of female pelvis froma lateral approach

Sphincter ani externus muscle, close-up view

The specimen shown in the previous view is here seen in a close-up centered on the sphincter ani externus muscle.

1. Levator ani muscle (pointer on puborectalis muscle)
2. Inferior rectal artery (small branch cut off)
3. Anococcygeal nerve
4. Anococcygeal ligament
5. Area of communication between ischiorectal fossae of two sides
6. Deep part
7. Superficial part
8. Subcutaneous part (6-8 refer to the external anal sphincter)
9. Anus
10. Longitudinal muscle layer of anal wall
11. Central tendon of perineum
12. Vaginal wall
13. Vestibule of vagina (opened by removal of labia on right side)
14. Ischiorectal fossa (remnant of anterior recess)
15. Obturator fascia
16. Dorsal artery of clitoris
17. Crus of clitoris
18. artery of vestibular bulb
19. Vestibular bulb
20. Major vestibular gland