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Male Reproductive System. Males begin producing sperm at puberty The production of sperm continues until very old age, unless disrupted by disease or environmental factors. Sperm. The Journey of Sperm.
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Males begin producing sperm at puberty • The production of sperm continues until very old age, unless disrupted by disease or environmental factors
The Journey of Sperm • Sperm are made in seminiferous tubules inside of the testes, which are held away from the body by the scrotum • sperm are produced at 97 degrees F • sperm are stored in the epididymis
Sperm journey continue- • they travel to the urethra by the vas deferens • Sperm pass through seminal vesicles, which add fructose, amino acids, and vitamins for fuel
Sperm also pass through- • The prostate gland adds an alkaline (basic) solution to neutralize the vagina’s acidic environment.
Still traveling through the urethra- • Cowper’s gland has secreted mucus into the urethra and now adds thick alkaline solution to sperm and other fluids • This fluid is now called semen • The penis is an adaptation for internal fertilization
Hormones….. • Between the seminiferous tubules in the testes are interstitial tissues where cells produce testosterone (the male hormone)
Testosterone is responsible for the secondary sex characteristics which appear at puberty: • hair on face, legs, and armpits • formation of the “Adam's apple” • broad shoulders • change in voice