The Male Sexual Response

on 20.7.06 with 0 comments



  • Erection of the Penis
parasympathetic stimulation (S2,3,4) -----> dilation of arterioles of corpus cavernosum -----> ventral surface engorged with blood; arterial shunt of blood from corpus spongiosum -----> more blood sent to the corpus cavernosum---> engorgement with blood compresses veinous drainage -----> penis cavities remain engorged with blood.
  1. impotence - inability to attain/maintain erection
  • Ejaculation of Sperm
sensory impulses reach critical level -----> sympathetic activation of testes tubules -----> reproductive ducts/glands contract peristaltically -----> bladder sphincter muscle constricts (no urine) -----> sperm moves into the urethra -----> bulbospongiosus muscles contract to expel semen

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Category: Physiology Notes

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