amphibian

Amphibians are tetrapod vertebrates of the class Amphibia, characterised by their ability to undergo metamorphosis from an aquatic juvenile stage to a terrestrial adult stage. Amphibians are ectotherms, meaning that they rely on external sources of heat to regulate their body temperature.

Amphibians are found on every continent except Antarctica. There are over 8,000 species of amphibians, including frogs, toads, salamanders, and caecilians.

Amphibians have a number of adaptations that allow them to live both on land and in water. Their skin is smooth and moist, which helps to keep them hydrated. They also have a dual respiratory system, which allows them to breathe through their skin and lungs.

Amphibians are an important part of the ecosystem. They help to control insect populations and they are a food source for many other animals.

Here are some of the characteristics of amphibians:

• Skin: Amphibians have smooth, moist skin that helps to keep them hydrated. Their skin is also permeable, which means that they can absorb water through their skin.
• Respiration: Amphibians have a dual respiratory system, which allows them to breathe through their skin and lungs. They also have gills in their larval stage.
• Reproduction: Amphibians lay eggs in water. The eggs hatch into larvae, which are aquatic. The larvae undergo metamorphosis to become adults.

The researchers studied the amphibian's habitat in the rainforest.