Amphibians are a class of animals that are characterized by several distinct features:
They are vertebrates - this means they have a backbone.
They are cold-blooded - their body temperature is regulated by their environment.
They have moist, permeable skin - this allows them to breathe through their skin and absorb water.
They undergo metamorphosis - they typically begin life as aquatic larvae and then transform into adult forms that can live on land.
They lay their eggs in water - most amphibians have external fertilization, meaning that the eggs are fertilized outside of the female's body.
They have a three-chambered heart - this means that their circulatory system is less efficient than that of mammals and birds.
They are found in a wide range of habitats - including freshwater, saltwater, and terrestrial environments.
They are an important indicator species - as they are sensitive to changes in their environment, they can help scientists monitor the health of ecosystems.
0 Comments