The American bullfrog is an aquatic frog. This frog has an olive green back and sides blotched with brownish markings and a whitish belly spotted with yellow or grey. The upper lip is often bright green and males have yellow throats. It inhabits large swamps, ponds, and lakes, where it is usually found along the water's edge.
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Frogs begin their lives as a tadpole which are amphibians. Tadpoles live underwater and breathe using gills which are tiny flaps under their skin. The gills job is to extract the oxygen dissolved in the water. The gills will collect and trap the oxygen from the water, which will then be transferred to the rest of their bodies.
As a tadpole begins to transform into a frog, they begin developing lungs, feet and they loose their tales. For a bullfrog, this transformation will take about three years. The tadpole will first loose its gills and develop lungs. While it still has its tail, it begins to use its lungs to breathe. They will come up out of the water to breathe.
Frogs breathe through their nostrils and the air breathed is pulled down into their lungs by their pulsing throats. They release carbon dioxide when they have body contractions. When a frogs lungs are filled with air, they become more buoyant in water. They also have blood vessels on their skin which will help them breathe too.
As a tadpole begins to transform into a frog, they begin developing lungs, feet and they loose their tales. For a bullfrog, this transformation will take about three years. The tadpole will first loose its gills and develop lungs. While it still has its tail, it begins to use its lungs to breathe. They will come up out of the water to breathe.
Frogs breathe through their nostrils and the air breathed is pulled down into their lungs by their pulsing throats. They release carbon dioxide when they have body contractions. When a frogs lungs are filled with air, they become more buoyant in water. They also have blood vessels on their skin which will help them breathe too.