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  1. What Is a Kidney? - Cleveland Clinic

    Nov 5, 2025 · Kidney Your kidneys are organs that filter your blood. They remove waste and balance your body’s fluids, among other tasks. Most people have one kidney on either side of …

  2. Your Kidneys & How They Work - NIDDK

    The kidneys are two bean-shaped organs, each about the size of a fist. They are located just below the rib cage, one on each side of your spine. Healthy kidneys filter about a half cup of …

  3. Kidney - Wikipedia

    Each kidney is attached to a ureter, a tube that carries excreted urine to the bladder. The kidney participates in the control of the volume of various body fluids, fluid osmolality, acid–base …

  4. How Your Kidneys Work | National Kidney Foundation

    Oct 15, 2024 · Inside each kidney are up to a million tiny parts called nephrons that help filter (clean) your blood. Once the kidneys filter the blood, the cleaned blood is sent back into the …

  5. Introduction to your kidneys - American Kidney Fund

    Where are my kidneys located and what do they look like? Your kidneys are bean-shaped organs located near the middle of your back, one on either side of your spine. Each is about the size …

  6. Kidney | Function, Structure & Disease | Britannica

    Nov 21, 2025 · Kidney, in vertebrates and some invertebrates, organ that maintains water balance and expels metabolic wastes. Primitive and embryonic kidneys consist of two series of …

  7. About the Kidneys | ColumbiaDoctors

    Learn more about what the kidneys are, what the kidneys do in the body, signs of kidney disease, and treatments that can help.

  8. How Do Kidneys Work A Simple Guide to Kidney Function and …

    May 13, 2025 · Each kidney is about the size of a fist and contains around a million tiny filtering units called nephrons. These organs are not just filters but also play a role in hormone …

  9. What do kidneys do in the body? - Kidney Research UK

    4 days ago · The kidneys are highly complex organs that control substances in the blood, blood pressure, and the amount of fluid in the body. They also keep the blood clean and chemically …

  10. The kidneys: how they work and what happens when they don’t

    The kidney is about the size of a human fist and weighs about five ounces (150 grams). Kidneys eliminate waste from normal metabolic processes, regulate fluid and electrolyte balance, …