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2014-07-24T23:43:29+08:00

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In circulatory system,example heart attack.It begins when you ate too much fats.It blocking the path of the blood *blood vessel* so the heart reacts because there not enough blood inside it.The respiratory system if you smoking too much or your a chain smoker that will cause you a lung cancer.
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2014-07-25T18:04:08+08:00
They Begin To develop when they keeping their circulatory and respiratory not healty example drinking beer etc. 
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