Urinary reflux

[Dave Paprocki]

Urinary reflux is when urine flows backward from the bladder into the ureter and sometimes the kidney, usually because of a birth defect of the urinary tract.
Each kidney continuously filters waste from the blood to produce urine. The urine then drains through the ureters into the bladder at a low pressure. From the bladder, urine drains through the urethra to exit the body. In males, the urethra is located in the penis. In females, the urethra ends in the vulvar area (the area of the external female genital organs).