1. Kidney
  2. Bladder
  3. Spleen
  4. Liver
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1 Answers

Option 1 : Kidney

  • The Kidneys are located on both sides of the human body.
  • The kidneys are bean-shaped organs, located against the back muscles in the upper abdominal area.
  • They sit opposite each other on both the left and right sides of the body.
  • Each kidney is about 4 or 5 inches long and their role is to filter the blood.
  • They remove waste, control the body's fluid balance, and keep the right levels of electrolytes.
  • The nephron is the structural and functional unit of the kidney.
  • Each human adult kidney contains around 1 million nephrons.

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