1. Animal Reproduction Male Reproductive Anatomy Original Power Point Created by Linda Rist Modified by Georgia Agricultural Education Curriculum Office June 2002

2. Male Reproductive Tract Testes - male gonad located externally in scrotum except in birds produce sperm produce male hormone - testosterone

3. Scrotum thermal regulatory organ temperature control necessary for sperm production cannot occur at body temperature

4. Scrotum heat can cause infertility spermatogenesis - maturation of sperm cells - takes about 50 days

5. Epididymis 3 portions caput - head corpora - body cauda - tail ****diagram

6. Epididymis 10 - 15 days for the sperm cells to pass through the epididymis Functions - maturation of sperm cells storage of sperm cells

7. Vas Deferens passageway for sperm cells

8. Accessory Glands Seminal Vesicles Prostate Gland Cowper’s gland

9. Accessory Glands Provide 95-98% of total ejaculate volume

10. Seminal Vesicles secrete fructose - energy source for sperm 40-80% of ejaculate volume

11. Prostate Gland secretes enzymes 15-30 % of ejaculate volume

12. Cowper’s Gland cleanse and neutralize urethra keep sperm from dying

13. Urethra passageway for semen carries semen to the end of the penis

14. Retractor Muscle retracts penis pulls the penis back within the sheath

15. Sigmoid Flexor extends penis from the sheath

16. Penis deposits semen in the female reproductive tract

17. Sheath encloses the penis not present in primates

18. Hormones testosterone functions stimulate spermatogenesis maturation of sperm cells

19. Hormone functions development of accessory sex glands Libido - sex drive builds muscle Responsible for male characteristics