1. Male Reproductive System

3. Function 1.Produce Sperm- reproductive cells (male gametes) and transfer to the female body via 2.Cannot produce sperm until puberty (12-16 yrs.) 3.Testosterone controls production of sperm (Male sex hormone released by the 4.Testosterone signals physical changes (ie. Deepening of the voice, facial hair, muscles, body hair) 5.Sperm- Males produce millions of sperm each day (about 500 million are ejected at one time) sexual intercourse Pituitary Gland)

4. Testosterone

5. External Organs 1.Testes AKA Testicles – two small glands; release testosterone and produce sperm oIn pouch because want to remain cooler than the rest of the body o95.6 degrees – cooler by 3 degrees 2.Scrotum – external skin sac; holds the testes 3.Penis – located just above testes; composed of spongy tissue and blood vessels. Because of this, when blood flows to penis, this is what causes penis to become erect. oErections occur more frequently during puberty and can occur for no reason – DRASTIC HORMONAL CHANGES oThe older you get, the less frequent you have them due to less testosterone

6. Stages of Testosterone

7. Beginning stages of Puberty Hormonal Changes  semen (fluid that contains sperm) released during sleep… Nocturnal Emission

8. Internal Organs Path of Sperm: 1.Develops in Testes (Seminiferous Tubules) 2.Matures in Epididymus (Finished developing) 3.Vas Deferans (4-6 weeks later) 4.Urethra (ejaculation)

9. Internal Organs continued… Cowper’s Gland Lubricates/Cleans urethra during sexual arousal Produces secretions known as pre-ejaculate Prostate Gland Controls flow of urine Prostate and Seminal Vesicles form semen during sexual arousal

10. Maintain 1.Bathe 2.Protective Equipment 3.Abstain sexual “behaviors” (only 100% effective way of preventing STDs) 4.Self Examinations (pg. 450 testicular exams) 5.Regular check-ups

11. Problems Sterility: inability to reproduce because low sperm count or quality is poor Causes: chemicals X-rays/radiation Hormonal imbalance Anabolic steroids contracted STD

12. Problems Testicular Cancer: Cancer in testicles; exact cause is unknown Symptoms: Discomfort, or pain in the testes **most common form of cancer in men between the ages of 15 & 35 People who are at risk: Men who: Are older, and rarely in younger boys Caucasion rather than African-American or Asian-American

13. Problems Prostate Cancer: Prostate develops a tumor Symptoms: urine leakage Blood in urine or semen People who are at risk: Men who: Are African-american are older than 60 have father/brother with prostate cancer Use too much alcohol Have a high fat diet