Answers

2015-06-14T20:07:51+08:00
In my opinion, there is no such thing as "bad system".
All systems in our body has its own use and importance.
Every system supports each other to keep us alive.
if one system fails to do it's function properly, then all the other systems will be affected.
:)
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2015-06-14T20:56:05+08:00
There are no bad systems in our body because each system has a role or importance in our body

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