MCQ
From the following state organs which are correctly matched with their primary function?
OrgansFunction
 (i) Kidney (a) Excretion of Urea
 (ii) Skin (b) Excretion of sweat
 (iii) Lungs (c) Excretion of carbon dioxide
 (iv) Liver (d) Detoxify ammonia
  • A
    (i) and (ii)
  • B
    (i), (ii) and (iv)
  • C
    (ii) and (iii)
  • All of these

Answer

Correct option: D.
All of these
(d) All of these
Explanation:
Kidneys are primary excretory organs for removal of metabolic wastes specifically nitrogenous wastes i.e., urea from the blood and throwing it out as urine.
Skin has sweat glands for excretion of extra water along with sodium chloride and small amounts of urea and lactic acid in the form of sweat.
Our body produces carbon dioxide while break down of glucose to get energy. Then $CO _2$ is excreted out as waste while exhaling.
Liver detoxifies by the conversion of ammonia into urea which is excreted through urination. Apart from urea, liver also breaks down cholesterol, alcohol, nicotine and drugs.

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