- Vagina: The tube in a woman's body that runs beside the urethra and connects the uterus (womb)to the outside of the body. Sometimes called the birth canal. Sexual intercourse, the outflow of blood during menstruation and the birth of a baby all take place through the vagina.
- Vas: Also referred to as vas deferens. The cordlike structure that carries sperm from the testicle to the urethra.
- Vascular: Having to do with blood vessels.
- Vein: Blood vessel that drains blood away from an organ or tissue.
- Vena cava: Vein carrying blood to the heart.
- Vesicoureteral reflux: Also referred to as VUR. An abnormal condition in which urine backs up from the bladder into the ureters and occasionally into the kidneys, raising the risk of infection.
- Void: To urinate, empty the bladder.
- Voiding: Urinating.