The penile erection mechanism is caused by the relaxation of smooth muscle fibers within the corpus cavernosum. This allows blood to flow into the spongy tissue, causing an increase in size and firmness. Sensory and motor neurons are involved in this process, including sympathetic nerves that control vascular tone and sensory nerves that detect touch and temperature changes. Increased intracavernous pressure causes the opening of venules, allowing further blood influx. The glans penis also becomes engorged during sexual excitement. Erectile dysfunction can be caused by various factors, such as psychological stressors, medications, and chronic diseases. Ejaculation is triggered when sperm cells reach the seminal vesicles and prostate gland. Semen contains fructose, zinc, citric acid, and other substances necessary for fertilization. Premature ejaculation may result from anxiety, medications, or physiological issues. Delayed ejaculation can arise from physical or psychological problems. Retrograde ejaculation occurs when semen enters the bladder instead of exiting through the urethra. Inhibited orgasm may result from emotional trauma, neurological disorders, or certain medications. Explanation:
The male ejaculatory system is controlled by complex neural pathways involving multiple hormones, neurotransmitters, and reflexes. Sexual arousal begins with increased blood flow to the genitals, leading to erection. Penile erection involves relaxation of smooth muscle fibers within the corpus cavernosum, while sensory and motor neurons transmit signals between brain areas responsible for sexual stimulation and response. Factor X (FX) plays a key role in initiating ejaculation; its absence can cause delayed or absent ejaculation. Erectile dysfunction can be caused by psychological stressors, medications, and medical conditions like diabetes and hypertension. It is important to discuss this issue with a healthcare provider to determine an appropriate treatment plan. Ejaculation occurs after a series of steps that include the release of semen from the vas deferens and contractions of muscles around the penis and perineum. Semen contains fructose, zinc, citric acid, and other substances necessary for fertilization. Premature ejaculation may result from anxiety, medications, or physiological issues. Delayed ejaculation can arise from physical or psychological problems. Retrograde ejaculation occurs when semen enters the bladder instead of exiting through the urethra. Inhibited orgasm may result from emotional trauma, neurological disorders, or certain medications.