ANATOMY

Detailed explanation-1: -The urine flows from the kidneys through the ureters to the bladder. The urine is stored in the bladder until it leaves the body through the urethra.

Detailed explanation-2: -The ureters connect to the bladder through a tunnel that acts as a valve to keep urine from flowing backward. Sometimes, a ureter has a bad connection to the bladder wall. When there is not enough of the tunnel at the connection point, reflux will occur.

Detailed explanation-3: -The kidneys are located toward the back of the upper abdomen. They filter waste and fluid from the blood and produce urine. Urine moves from the kidneys through narrow tubes to the bladder. These tubes are called the ureters.