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  1. Urine - Wikipedia

    Urine, excreted by the kidneys, is a liquid containing excess water and water-soluble nitrogen-rich by-products of metabolism including urea, uric acid, and creatinine, which must be cleared …

  2. Urine: Urination, Composition, Production, Color & Odor

    Jan 14, 2025 · Urine is liquid waste that your kidneys make to remove excess fluids and waste products from your body. It mostly consists of water, but it also contains waste products, salt …

  3. Urine color - Symptoms and causes - Mayo Clinic

    Oct 11, 2025 · Foods and medicines can change the color of urine. But a color change also could be a sign of disease.

  4. Urine Color and Odor: What It Reveals About Your Body - WebMD

    Feb 19, 2025 · But the basic details of your urine — color, smell, and how often you go — can give you a hint about what’s going on inside your body. Pee is your body’s liquid waste, mainly …

  5. Urine | Definition, Composition, & Facts | Britannica

    Nov 11, 2025 · Urine, liquid or semisolid solution of metabolic wastes and certain other, often toxic, substances that the excretory organs withdraw from the circulatory fluids and expel from …

  6. Anatomy of the Urinary System - Johns Hopkins Medicine

    The urinary system's function is to filter blood and create urine as a waste by-product. The organs of the urinary system include the kidneys, renal pelvis, ureters, bladder and urethra.

  7. The Urinary Tract & How It Works - NIDDK

    Describes how the urinary tract works, why it’s important, what affects the amount of urine produced, and how to keep the urinary tract healthy.

  8. Urine and Urination - MedlinePlus

    May 10, 2021 · Your kidneys make urine by filtering wastes and extra water from your blood. The waste is called urea. Your blood carries it to the kidneys. From the kidneys, urine travels down …

  9. Urinary Tract Physiology - Urologists.org

    The urinary system produces, stores and eliminates urine, the fluid waste excreted by the kidneys. Learn how it works and how to avoid urinary tract infection.

  10. Physical Characteristics of Urine | Anatomy and Physiology II

    Urine characteristics change depending on water intake, exercise, environmental temperature, and nutrient intake. Urinalysis analyzes characteristics of the urine and is used to diagnose …