Male reproductive system

• The prostate gland is a walnut-sized gland located below the bladder and in front of the rectum, and it produces a fluid that nourishes and protects sperm.
• Spermatogenesis is the process by which immature cells called spermatogonia develop into mature spermatozoa within the seminiferous tubules.
• Testosterone promotes the growth of body hair, deepens the voice, and increases muscle size and strength.
• The testes are located outside the body to maintain an optimal temperature for sperm production.
• Testosterone is the primary male sex hormone responsible for the development and regulation of male sexual characteristics.
• Sperm is produced in the seminiferous tubules within the testes.
• The epididymis stores and transports sperm from the testes to the urethra.
• The urethra carries urine out of the body during urination and carries semen out of the penis during ejaculation.
• The epididymis stores and transports sperm from the testes to the vas deferens.
• The vas deferens carries sperm from the epididymis to the ejaculatory duct during sexual stimulation.
• The bulbourethral glands produce mucus that lubricates the penis during ejaculation.
• The urethra carries urine out of the body through the penis.
• The prostate gland secretes fluid that nourishes and protects sperm, making up about one-third of the volume of semen.
• Orgasm refers to the pleasurable sensation experienced by both males and females during sexual activity.
• The bulbourethral (Cowper's) glands secrete mucus that lubricates the urethra during sexual excitement.
• The seminal vesicles produce a thick, alkaline fluid that makes up most of the volume of semen and helps neutralize acidic vaginal secretions.