The kidneys in human beings are a part of the
Last updated Jun 9, 2026
Correct Answer:
Option A —
Excretion system
The main function of the kidneys is to filter waste products, excess water, and other impurities from the blood. These waste products are then excreted from the body in the form of urine.Here is a quick breakdown of the other systems mentioned for context:
Nutrition system (Digestive system): Involved in breaking down food and absorbing nutrients (e.g., stomach, intestines).
Respiration system: Involved in breathing and gas exchange (e.g., lungs).
Transportation system (Circulatory system): Involved in moving blood, nutrients, and oxygen throughout the body (e.g., heart, blood vessels).
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