tube that carries sperm out of the testicle

surgery to cut out part or all of the ductus deferens-done to make a man not able produce children

drug used to make blood vessels tighten up and become narrower

drug used to make blood vessels open up and become bigger

narrowing of the blood vessels in the brain

surgery to undo a vasectomy by connecting up the ductus deferens again-done to make a man able to produce children again

blood test used to detect syphilis

a carrier, usually an insect, that carries and transmits disease causing microorganisms

the type of blood vessel that carries blood back to the heart from the rest of the body

surgery to remove twisted (varicose) veins in the legs

largest vein in the body

entering the vein with a needle