Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 6: Pelvis, Perineum, Hip, and Upper Thigh

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Atlas of Human Anatomy in Cross Section: Section 6. Pelvis, Perineum, Hip, and Upper Thigh

Plate 6.32

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed

Upper Left Quadrant	Lower Left Quadrant	Lower Right Quadrant	Upper Right Quadrant
1. Mons pubis 2. Corpus cavernosum clitoris 3. Adductor magnus m. 4. Bulb of vestibule and greater vestibular gland 5. Ligamentum teres (round ligament) of uterus 6. Adductor brevis m. 7. Sartorius m. 8. Pectineus m. 9. Rectus femoris m. 10. Tensor fascia lata m. 11. Vastus lateralis m. 12. Obturator a., v., and nerve (posterior ramus) 13. Vastus intermedius m. 14. Adductor minimus m. 15. Fascia lata and vastus medialis m. 16. Vastus lateralis m.	17. Medial femoral circumflex a. and v. and quadratus femoris m. 18. Pubic ramus and ischiocavernosus m. 19. Sciatic nerve 20. Posterior (femoral) cutaneous nerve (of thigh) 21. Gluteus maximus m. 22. Uterovaginal venous plexus 23. Ischiorectal fossa 24. Internal anal sphincter 25. Perineal body	26. Anus 27. Sphincter ani m. 28. Inferior rectal a. and v. and ischiocavernosus m. 29. Gluteus maximus m. 30. Sciatic nerve 31. Pudendal blood vessels 32. Femur 33. Pubic ramus	34. Iliopsoas m. 35. Lateral femoral circumflex a. and v. and femoral nerve brs. 36. Femoral nerve, br. to rectus femoris m. 37. Femoral a. and v. 38. Obturator externus m. 39. Saphenous v. 40. Ligamentum teres (round ligament) of uterus 41. Vagina 42. Urethra 43. Corpus cavernosum clitoris 44. Body of clitoris and septum corpora cavernosa

This section passes through the mons pubis (1), corpora cavernosa of the clitoris (2, 43), urethra (42), vagina (41), ischiocavernosus muscles (18, 28), femora (32), and anus (26).

The clitoris is located posterior to the pubic symphysis at the anterior end of the pudendal rim. It consists of a body, two crura, and a glans. The body is not free, like that of the penis, but is embedded in the connective tissue of the vulva. The body of the organ (44) is formed by the fusion of the two corpora cavernosa (2, 43), which differ from those of the penis only in size. It extends from the pubic arch anteriorly and posteriorly, being curved, and is about 2 to 2.5 cm in length. Unlike the penis, the third cavernous body is missing from the clitoris. At the inferior border of the pubis the two corpora cavernosa separate, bend sharply caudally, laterally, and dorsally, and follow the inferior borders of the inferior rami of the pubic bones (18, 33). These are the crura (legs) and they are covered by ischiocavernosus muscles (18, 28). A glans is attached to the distal end of the fused corpora cavernosa.

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