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Question

Lungs help in excretion of carbon dioxide.
  1. True
  2. False


Solution

The correct option is A True
Various substances like carbon dioxide, urea, ammonia, salts, etc., are produced by our body. These substances are not required and it has to be removed. Lungs help in the removal of carbon dioxide by exhalation. Nitrogenous wastes and salts are removed by the excretory system. Some amount of salt is excreted by sweat too.

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