Figure rectum

1. Rectum - Rectum
2. Anal canal -
   Canalis analis
3. Upper rectal artery
   Superior rectal artery
4. Rectal vein plexus -
   Rectal venous plexus
5. Rectum-anal canal boundary -
   Anorectal junction
6. After lifter -
   Levator ani muscle
7. Posterior columns -
   Columnae anales
8. After pens -
   Sinus anales
9. Internal anal sphincter -
   M. sphincter ani internus
10. External anal sphincter -
    M. sphincter ani externus
11. Anal canal-skin boundary -
    Linea anocutanea
12. nach - anus
13. Aft ridge line -
    Linea pectinata
14. Sacrum - Sacrum
15. Prostate gland -
    prostate
16. Urinary bladder -
    Vesica urinaria
17. Uterus -
    uterus
18. Sheath -
    vagina

You can find an overview of all Dr-Gumpert images at: medical illustrations