Amphibia:
Amphibians (class Amphibia) comes from Greek, meaning
"Aquis- both" and "Bios- life",
thus known as double 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
6,200 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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