Dissection of female pelvis from a lateral approach

Interior of anal canal and lower part of rectum, close-up view

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Image #162-1

Dissection of female pelvis from a lateral approach

Interior of anal canal and lower part of rectum, close-up view

The lower part of the dissection shown in the preceding photograph is shown in more detail in this close-up view centered on the anal canal.

1. Levator ani muscle
2. Mucosal tunic of rectum (note numerous small depressions or pits in mucosa marking the sites of lymphatic nodules (folliculi Iymphatici))
3. Anal columns
4. Pectinate line
5. Anal verge
6. Hemorrhoidal zone
7. Internal anal sphincter muscle
8. External anal sphincter muscle
9. Plicae transversales of rectum
10. Opening of uterus
11. Anterior labium
12. Posterior wall of vagina
13. Vagina
14. Upper pointer: Anterior wall of vagina Lower pointer: Vesicovaginal septum
15. Muscular tunic of urinary bladder
16. Urinary bladder
17. Vesical sphincter muscle
18. Posterior vaginal wall posterior
19. Hymenal caruncles
20. Vestibule of vagina
21. Levator ani muscle (puborectalis muscle, inserting into wall of anal canal)
22. Central tendon of perineum