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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

    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 and electrolytes.

  3. 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 …

  4. Urine | definition of urine by Medical dictionary

    Besides waste materials, urine also contains surpluses of products necessary for bodily functioning, such as water, sodium chloride, and other substances. Thus in a typical specimen …

  5. Urine - Physiopedia

    Urine is a liquid waste produced by the kidneys. Urine is a clear, transparent fluid that normally has an amber color. The average amount of urine excreted in 24 hours is between 5 to 8 cups …

  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. Urine: What Does It Mean And Why It Matters | MedShun

    Jul 22, 2025 · Urine is a liquid waste produced by the kidneys in vertebrates. It is composed of water, waste products, salts, and electrolytes. The colour and odour of urine can vary …

  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. URINE Definition & Meaning - Merriam-Webster

    : waste material that is secreted by the kidneys, is rich in the end products of protein breakdown, and is usually a yellowish liquid in mammals but semisolid in birds and reptiles.

  10. 24.4B: Chemical Composition of Urine - Medicine LibreTexts

    Normal urine consists of water, urea, salts, and pigments. Urine is a liquid by-product of the body secreted by the kidneys through a process called urination and excreted through the urethra. …