1. Male Reproductive System

2. Before we begin… We need to be mature and respectful during this unit… We need to be mature and respectful during this unit… I guarantee you will have questions…ASK! I guarantee you will have questions…ASK! Why do we need to know the Male and Female Reproductive Systems? Why do we need to know the Male and Female Reproductive Systems?

3. Functions Produce and store sperm Produce and store sperm Sperm – male reproductive cell Sperm – male reproductive cell Transfer sperm to female body during sexual intercourse – the act of the male penis being inserted into the female vagina Transfer sperm to female body during sexual intercourse – the act of the male penis being inserted into the female vagina Reproduce!!! Reproduce!!!

5. How the male body changes During early teen years (12-15) the body starts to produce testosterone – the male sex hormone. During early teen years (12-15) the body starts to produce testosterone – the male sex hormone. Testosterone triggers many physical changes Testosterone triggers many physical changes Broad shoulders Broad shoulders Development of muscles Development of muscles Facial/body hair Facial/body hair Deep Voice Deep Voice

6. These changes are known as puberty. These changes are known as puberty. After puberty begins, a male is capable of producing sperm for the rest of his life. After puberty begins, a male is capable of producing sperm for the rest of his life.

7. External Reproductive Organs Testes – two small glands that secrete testosterone and produce sperm Testes – two small glands that secrete testosterone and produce sperm Scrotum – sac which houses the testes. Scrotum – sac which houses the testes. Penis – tube-shaped organ that extends from the body just above the testes Penis – tube-shaped organ that extends from the body just above the testes

10. The male penis During arousal, blood flow to the penis increases - vasocongestion. During arousal, blood flow to the penis increases - vasocongestion. This causes an erection – an enlargement of the penis This causes an erection – an enlargement of the penis Body’s preparation for sexual intercourse Body’s preparation for sexual intercourse

11. The male penis… When penis becomes erect, semen can be ejected from the body When penis becomes erect, semen can be ejected from the body Semen – thick fluid containing sperm and other secretions Semen – thick fluid containing sperm and other secretions A series of muscular contractions occurs, thus creating an ejaculation – expulsion of semen from the male penis. A series of muscular contractions occurs, thus creating an ejaculation – expulsion of semen from the male penis. Nocturnal Emissions may occur – ejaculation that occurs during sleep. This is perfectly normal! Nocturnal Emissions may occur – ejaculation that occurs during sleep. This is perfectly normal!

12. The male Penis… Foreskin – thin, loose flap is skin that covers the tip of the penis Foreskin – thin, loose flap is skin that covers the tip of the penis Usually removed at birth Usually removed at birth This is known as circumcision This is known as circumcision

13. Circumcision

14. Internal Organs Epididymis – tube above the testis in which sperm is matured and stored Epididymis – tube above the testis in which sperm is matured and stored Vas Deferens – long tube which carries sperm to an organ called the seminal vesicle Vas Deferens – long tube which carries sperm to an organ called the seminal vesicle

15. Internal Organs *Prostate and *Cowpers glands – secretions from these glands combine with the sperm to form semen. *Prostate and *Cowpers glands – secretions from these glands combine with the sperm to form semen. *Seminal Vesicle – produces fluid that mixes with sperm to nourish the sperm and make it more mobile *Seminal Vesicle – produces fluid that mixes with sperm to nourish the sperm and make it more mobile * These three are known as accessory glands. * These three are known as accessory glands. Semen exits the body through the urethra Semen exits the body through the urethra

17. Staying Healthy Bath regularly Bath regularly Wear Protective Equipment Wear Protective Equipment Practice Abstinence – not having sex before marriage to avoid STD’s – sexually transmitted disease Practice Abstinence – not having sex before marriage to avoid STD’s – sexually transmitted disease Perform self-exams Perform self-exams Get regular check-ups! Get regular check-ups!

18. Staying Healthy Bath regularly Bath regularly All males should wash pubic area with soap and water All males should wash pubic area with soap and water Uncircumsized males need to pull back foreskin and clean Uncircumsized males need to pull back foreskin and clean

19. Problems Sterility – inability to reproduce Sterility – inability to reproduce Result of too few sperm or sperm of poor quality Result of too few sperm or sperm of poor quality May be caused by: May be caused by: Exposure to chemicals, lead, x-rays, radiation Exposure to chemicals, lead, x-rays, radiation Hormonal imbalances, STDs, steroids! Hormonal imbalances, STDs, steroids!

20. Problems Testicular Cancer Testicular Cancer Occurs mostly between ages of 14-40 Occurs mostly between ages of 14-40 Mostly treatable with early detection Mostly treatable with early detection

21. Problems Prostate Cancer Prostate Cancer The prostate gland can become enlarged due to tumors The prostate gland can become enlarged due to tumors The earlier you detect this, the greater the chance of recovery. The earlier you detect this, the greater the chance of recovery.