has quality develops from ridged perineum mesoderm-derived structure urogenital fold external soft tissue zone raphe of perineum perineal raphe The perineal raphe extends from the anus, through the mid-line of the scrotum (scrotal raphe) and upwards through the posterior mid-line aspect of the penis (penile raphe). Wikipedia:Perineal_raphe raphe perinei UBERON:0035106 raphe perinealis FMA:20244