Amphibian
Amphibians (
class Amphibia; from
Greek αμφις "both" and βιος "life") are a
taxon of
animals that include all living
tetrapods (four-legged
vertebrates) that do not have
amniotic eggs, are
ectothermic (term for the animals whose body heat is regulated by the external environment; previously known as cold-blooded), and generally spend part of their time on land. Most amphibians do not have the adaptations to an entirely terrestrial existence found in most other modern tetrapods (
amniotes). There are around 6,000 described, living
species of amphibians. The study of amphibians and
reptiles is known as
herpetology. Amphibians are able to breathe through their skin.
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Amphibia
Amphibien
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Amphibia