Answers

2016-04-14T16:27:53+05:30
For humans it is their lungs
For Aquatic animals it is gills
For amphibians it is skin and gills
For reptiles it is skin
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For Living things its :nose, eosophagus,trechea bronchi and bronchiols
For underwaters its gills and mouth cavity
for Reptiles its moist skin
2016-04-14T16:28:44+05:30
For humans it is their lungs
For Aquatic animals it is gills
For amphibians it is skin and gills
For reptiles it is skin

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