Penis - the internal structure of the penis consists of two cylinder-shaped vascular tissue bodies: the urethra (tube for expelling urine and ejaculate). The longest part of the penis is the shaft, at the end of which is the head, or glans penis. The opening at the tip of the glans, which allows for urination and ejaculation, is the meatus.
The structure of the urinary tract in men and women is quite similar until the last parts of the urinary tract. While women simply have a pee hole (urethra), men have a penis, which somewhat extends the male urinary tract.