P1: Identify and give functions for each of the following: testes, seminiferous tubules, interstitial cells, epididymis, ductus (vas)deferens, prostate gland, Cowper’s (bulbourethral) gland, seminal vesicles, penis, urethra.
P2: Demonstrate a knowledge of the path of sperm from the seminiferous tubules to the urethral opening
contains sperm and fluids from the seminal vesicles, the prostate and Cowper’s gland.
is used for nutrition , motility , neutralization, and lubrication
Seminal Vesicles :
lie at base of bladder
secrete a thick, clear fluid containing fructose (energy), prostaglandins (chemical signal in female to trigger rhythmic contractions of smooth muscle in female – facilitates movement of sperm towards egg
Secretes a milky alkaline buffer that protects the sperm from the acidic environment of the vagina.
secrete mucous secretes mucus rich fluids prior to ejaculation, thought to neutralize any remaining acidic urine in the urethra. Also contains some sperm before ejaculation – reason for high failure rate of withdrawl method of birth control.
May also help to lubricate the urethra
Double purpose tube (semen&urine) but NEVER at same time
Semen is expelled out of the urethra by rhythmic smooth muscle contractions = male orgasm