Biology / Bio 2295 · Atom · ~20 seconds
Amphibian Traits: Dual Life and Permeable Skin
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Most amphibians live a dual life, developing as aquatic larvae before metamorphosing into a terrestrial adult, relying on moist skin for gas exchange.
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A frog tadpole breathes through gills in water, then metamorphoses into an air-breathing adult that still absorbs oxygen through skin.
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Permeable skin that aids gas exchange also leaves amphibians vulnerable to water-borne pollutants and dehydration outside moist habitats.