Question 1
The kidneys in human beings are a part of the system for

(a) Nutrition
(b) Respiration
(c) Excretion
(d) Transportation

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Solution

(c) Excretion

The kidneys in human beings are a part of the system for excretion. Kidneys are the main excretory organs of the mammalian body. They filter blood to accumulate and excrete urea.

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The kidneys in human beings are a part of the system for

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