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Overview of the Urinary Tract

By

Glenn M. Preminger

, MD, Duke University Medical Center

Last full review/revision Jun 2019| Content last modified Jun 2019
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Each kidney continuously produces urine, which then drains through the ureter into the bladder at a low pressure. From the bladder, urine drains through the urethra and exits the body through the penis in males and at the vulva (the area of the external female genital organs) in females. Usually, urine is free of bacteria and other infectious organisms.

Organs of the Urinary Tract

Organs of the Urinary Tract
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Tubulointerstitial Nephritis
The kidneys contain tubules, which are structures in the kidneys that are involved in filtering fluids. Tubulointerstitial nephritis is inflammation that affects the tubules and the tissue surrounding them, called “interstitial tissue.” Onset of tubulointerstitial nephritis may be acute (sudden) or chronic (gradual) and often results in kidney failure. Which of the following is the most common cause of acute tubulointerstitial nephritis?
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