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
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