Answers

2015-07-05T17:43:25+05:30
The main purpose of excretion is the removal of nitrogenous wastes from our body, whose accumulation in our body may cause serious hazards. The other thing is that , not everything we eat is taken up or absorbed or utilized by our body. This remains is our body as waste . And to make way for the new waste substances, the old ones have to be removed. Thus, we excrete.
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