Note 24 — Chapter VII · GENERAL DIFFERENCES OF THE TWO LIVES WITH RESPECT TO VITAL POWER.

If the urine, during a perfect erection, does not go out of the bladder, it is because the contraction of the muscles of the perineum, and especially of the levator ani, prevents it. If these muscles are relaxed, though the turgescence of the corpus cavernosum and of the urethra remains the same, the urine flows out without any other obstacle than what arises from the contraction of the canal produced by the swelling of its parietes.