Anatomy

1. Bladder

2. Prostate

3. Rectum

4. Seminal Vesicles

5. Suspensory ligament (anchors the penis to the pubic bone)

6. Pubic bone

7. Urethra

8. Coccyx (tail bone)

9. Pelvic floor muscles (schematic)

10. Abdominal muscles above the pubic bone Note that the internal urinary sphincter is located at the base of the bladder (1) just above the prostate gland (2). The external urinary sphincter is embedded in the pelvic floor muscles (9) just below the prostate

1. Bulbospongiosus

2. Ischiocavernosus

3. Anal sphincter

4. Deep Transverse Perineal

5. Superficial Transverse Perineal

6. Levator Ani

7. Obturator Internus

8. Perineal body (central anchor point)

9. Ano-coccygeal body (anchors anal sphincters and Levator Ani muscles to coccyx)

10. Sacrum and coccyx (tail bone)

11. Ischial tuberosity (the bones you sit on)

12. Sacro tuberous ligament