Multiple choice general knowledge science & technology

Blood is filtered by which organ?

  1. Intestines

  2. Brain

  3. Nose

  4. Kidney
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The kidneys are the body's primary filtration system, removing waste products and excess substances from blood through millions of tiny filtering units called nephrons. Each kidney processes about 200 quarts of blood daily, producing about 2 quarts of waste fluid (urine). The kidneys also regulate blood pressure, electrolyte balance, and red blood cell production.

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