Introduction: Definition of Amphibians
Amphibians are a group of animals that are characterized by their ability to live both on land and in water. The word amphibian comes from the Greek word “amphibios,” which means “living a double life.” They are cold-blooded vertebrates that live in a variety of habitats, including freshwater, terrestrial, and arboreal environments. Some of the most well-known amphibians include frogs, toads, salamanders, and newts.
Characteristics of Amphibians
Amphibians have several distinct characteristics that set them apart from other groups of animals. One of the most notable characteristics is their permeable skin, which allows them to absorb oxygen and water directly through their skin. They also have a unique life cycle that involves metamorphosis, where they undergo a series of physical changes from a larval stage to an adult stage. Amphibians are also ectothermic, which means that their body temperature is regulated by their environment. They typically lay their eggs in water and have a larval stage that is aquatic, before metamorphosing into their adult form.