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M ale Reproductive System

M ale Reproductive System. Testosterone. Male Sex Hormone Initiates Physical Changes Broadening of the shoulders Muscle development Facial and body hair Deepen voice Produces sperm – male reproductive cells. External Male Reproductive Organs. Testicles/Testes.

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M ale Reproductive System

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  1. Male Reproductive System

  2. Testosterone • Male Sex Hormone • Initiates Physical Changes • Broadening of the shoulders • Muscle development • Facial and body hair • Deepen voice • Produces sperm – male reproductive cells

  3. External Male Reproductive Organs

  4. Testicles/Testes • Two small glands that produce sperm at the rate of 100 million per day • Hang outside the body in the Scrotum • Protects sperm by keeping the testes at a temperature slightly below normal body temp.

  5. Penis • Tube-shaped organ attached to the trunk of the body just above the testes • Composed of spongy tissue (contains many blood vessels) • Penis becomes enlarged and erect because of increased blood flow or sexual arousal • Circumcision – surgical removal of the foreskin of the penis

  6. Muscular Contractions • Ejaculation • Semen – a thick fluid containing sperm and other secretions from the male reproductive organs • If this happens during sexual intercourse = Fertilization • Union of a reproductive cell from a male and one from a female • Wet Dream

  7. Internal Male Reproductive Organs

  8. Epididymis • Coiled tube • Temporary storage facility for sperm • Where sperm mature

  9. Vas Deferens • Pair of connecting tubes • About 18 inches long • Lead up the body to the seminal vesicles and prostate gland • Thick muscle walls propel the sperm forward in powerful spurts

  10. Seminal Vesicles • Glands that are about 2 inches long • Attached to Vas Deferens • At the base of the bladder • Fluid • Contains nutrients • Mixes with sperm to make more mobile • Seminal Vesicles and Vas Deferens form to make: Ejaculatory Duct

  11. Prostate Gland and Cowper’s Gland • Prostate Gland • Gland that surrounds the Urethra • Cowper’s Gland • Located below prostate gland • Secretion neutralizes the acid content before semen ejaculated • Fluids secreted by both Glands • Semen (Seminal Fluid) fully formed

  12. Urethra • Passageway through which both semen and urine leave the body. • Semen and urine do not pass the body at the same time • Muscle near bladder contracts • Prevents urine from entering urethra when semen is present

  13. Male Reproductive Diagram

  14. Problems of the Male Reproductive System

  15. Hernia • Part of an organ pushes through an open membrane or muscle • Common spot is top of scrotum

  16. Sterility • Condition in which a person is unable to reproduce • Too Few Sperm or sperm of poor quality • Temporary Sterility • Tight Clothing • Extreme Cold • Illness • Permanent Sterility • X Rays • Radiation or Chemical exposure • Having Mumps as an older child • Smoking • Impotence – inability to maintain an erection

  17. Enlarged Prostate Gland • Enlarges due to: • Infection • Tumor • Old age • Squeezes the urethra causing in frequent or difficult urination. • Treatments: • Special exercises to improve bladder control • Medications to shrink enlarged prostate • Surgery to remove excess tissue

  18. Cancer • Uncontrolled growth of cells • Prostate Gland • Usually found in older males • Testes • Most frequently found in males 15-35 yrs old. • Slight enlargement of one of the testes • Dull ache in lower abdomen and groin, Hard lumps • If caught early can be cured

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