What is the main excretory organ in humans?
Answer and explanation
Correct answer: Kidneys
The kidneys are the main excretory organs in humans because they filter the blood and remove nitrogenous wastes, especially urea, along with excess salts and water. These substances are processed into urine. The lungs remove carbon dioxide and some water vapour, but their primary function is gas exchange; the heart and stomach do not perform the main excretory role. Hence option A is correct.
Frequently asked questions
What is the correct answer to this question?
Kidneys
Why is this the correct answer?
The kidneys are the main excretory organs in humans because they filter the blood and remove nitrogenous wastes, especially urea, along with excess salts and water. These substances are processed into urine. The lungs remove carbon dioxide and some water vapour, but their primary function is gas exchange; the heart and stomach do not perform the main excretory role. Hence option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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