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What is the role of the excretory system in the human body?

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to discharge waste materials from the body
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What is the role of the immune system in the human body?

to fight diease.   if you want to get more details,then in a nutshell, it has the  primary function of identification of and protection from  infections and some disease

What role do the lungs have in the excretory system?

Excretion is the removal of waste products made by the body. When you breathe out your lungs are removing waste carbon dioxide made by your cells. This is part of excretion. 

What role does the skin have in the excretory system?

· Skin o Expels water, sodium chloride and urea during sweating. (Incidental loss: because sweating is a response to a rise in temperature and not to a change in blood compos

Why is the excretory system important to the human body?

excretory system is important to a human begin because through the excretory system we are able to get rid of all the waste products in our body the lungs get rid of waste air