Anatomy and Physiology of the Male Sexual Response

5 important questions on Anatomy and Physiology of the Male Sexual Response

What is the Seminal vesicle?

- 1st accessory gland
- Lies on the posterior wall of the bladder
- Secretes 70% of the volume of semen
- Seminal fluid: Fructose, Fibronigen & Prostaglandins

What does the 3 seminal fluids from the Seminal Vesicle do?

- Fructose: Provides energy for the sperm
- Fibronigen: Help turn semen into a bolus that can easy propelled into vagina.
- Prostaglandins: Decrease cervical mucus viscosity and stimulate reverse peristalsis of the uterus

What does the Bulbourethral gland?

- 3rd accesory gland
- inferior to the prostate
- produces alkaline mucus:
  • neutralizes traces of acidic urine in the urethra
  • help lubricate the urethra and the head of the penis
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What is the Sexual response cycle of the human male?

(Desire phase, arousal stage, plateau stage, orgasm phase, resolution phase)

What happens in the Arousal stage?

  • Erotic thoughts
  • physical stimulation causes parasympathetic reflex that cause erection.
  • Release of: NO, dopamine, serotonine, oxytocine
  • cognitive factors (visual stimuli, activity in amygdala &hypothalamus) contribute to sexual arousal and sexual response in males.

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