Samantha Zimmerman
Structure of the penis (English)
Structure of the penis (English)
The root forms the fixed or anchored portion of the penis, while the body and gla…ns forms the free, pendulous part. The bulb of the penis, which consists of the proximal portion of the corpus spongiosum, lies firmly anchored to the perineal membrane/body, while the crura of the penis are fixed to the ischiopubic rami of the pelvic girdle. The penis is further stabilized by the suspensory and fundiform ligaments (not seen in this image). Enveloping the bulb and crura of the penis are the bulbospongiosus (removed) and ischiocavernosus muscles. These muscles aid in emptying the urethra and stabilizing the erect penis. Surrounding the structure of the penis and erectile tissues is the deep and superficial fascia/subcutaneous tissue of the penis. The deep fascia lies just superficial to the tunica albuginea of the penis and surrounds all three erectile tissues. As its name suggests, the superficial fascia is located most superficially and is continuous with the superficial fascia/subcutaneous tissue of the perineum (Colles’ fascia).
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