Advertisement Upgrade to remove ads

bulbourethral gland

one of a pair of exocrine glands near the male urethra

Cowper's gland

bulbourethral gland


ejection of sperm and fluid from the male urethra

ejaculatory duct

tube through which semen enters the male urethra


one of a pair of long, tightly coiled tubes on top of each testis.

erectile dysfunction

inability of an adult male to achieve an erection


hair-like projection on a sperm cell that makes it motile

fraternal twins

two infants of the same pregnancy from two separate ova fertilized by two different sperm

glans penis

sensitive tip of the penis

identical twins

two infantsresulting from division of one fertilized egg into two distinct embryos


inability of an adult male to achieve an erection

interstitial cells

in the testes, these cells lie between the seminiferous tubules and produce the hormone testosterone


tissue composed of essential and functional cells


external region between the anus and scrotum


fold of skin covering the tip of the penis (foreskin)

prostate gland

exocrine gland at the base of the urinary bladder


external sac that contains the testes


spermatozoa and seminal fluid

seminal vesicle

either of paired sac-like male exocrine glands that secretea fluid into the vas deferans

seminiferous tubules

narrow, coiled tubules that produce sperm in the testes


sperm cell


any procedure that removes an individual;s ability to produce or release reproductive cells


supportive, connective tissue of an organ

testis (testes)

male gonad (testicle) that produces spermatozoa and the hormone testosterone


hormone secreted by the interstitial tissue of the testes

vas deferans

narrow tube that carries sperm from the epididymis into the body toward the urethra

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording