Answers

2014-09-29T20:34:10+05:30
Respiratory system- It transfers oxygen into blood and gets rid of carbon dioxide from blood. 
Main organs - Nose ,wind pipe and lungs...
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2014-09-29T20:36:12+05:30
Respiratory system consists of the organs that help to breathe,
Parts of the respiratory system are

1)Nostrils
2)tracheae
3)bronchi
4)lungs
5)diaphragm

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