do reptiles have gills for respiration
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do reptiles have gills for respiration, do reptiles breathe by gills, do reptiles have lungs or gills, do reptiles breathe with lungs or gills, reptiles have gills or lungs, do reptiles have gills, do reptiles have gills as adults, do most reptiles have gills in common, do reptiles breathe through lungs, what do reptiles breathe through, how do reptiles respire, what organs do reptiles use to breathe, what do reptiles use to breath, does reptiles have lungs, respiratory system of reptiles