Ridged Band
Fig. 4Figure 4. Foreskin fully retracted. The ridged band is now located further down the shaft of the penis. Note the coarse wrinkling of the outer skin of the foreskin, just above the ridged band (arrowed) in this view. The wrinkling of the foreskin is due to contraction of Dartos muscle elicited by retraction of the foreskin and movement of the ridged band. There is similar but less apparent wrinkling and tightening of shaft skin, also due to contraction of Dartos muscle, within the skin itself.

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