Answers

2015-08-24T11:48:02+05:30

we know that frog is an amphibions which exchange the gases by their lungs and by skin , carbon dioxide is breathe out and oxygen is captivated by skin but in breeding period lungs exhales more oxygen , frog have mucus gland on his skin as a result that have moist skin that leads the oxygen to be captivate and impart to the blood vessels .
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