Hello everybody! Today we’re going to look
at a truly amazing group of vertebrates… When they’re born they usually live in water…
but when they grow up and become adults they spend most of their time on land. We present
– the Amphibians! All amphibians have some common characteristics
that you should know about so you can recognize and differentiate them.
Amphibians have thin, bare skin, with no hairs and scales to protect them. Most have four
legs and a membrane between their toes that allows them to move much better in the water. Amphibians are oviparous, but they don’t incubate their eggs after laying them… they
abandon them and don’t care for their young. Not very good parents, huh?
When they hatch, they’re small larvae and live in water. Slowly… very slowly… their
bodies go through a process called metamorphosis. During this process, the body of the amphibian…
changes… their front and rear legs, their limbs, grow… and their heads and their bodies
develop, so they finally look like their parents. In the early stages of their lives… amphibians
breathe through gills, but when they grow up and become adults… they breathe with
their lungs. The problem is, their lungs are very small, and cannot get all the oxygen they need to live. But nature is very clever… and has solved this problem by allowing them
to breathe and get the oxygen they need… through their skin. That’s why they need
to be near water – to keep their skin wet. In the early stages of their life, some amphibians are herbivores, but when they grow up… most become carnivores. So they need to hunt… Some have a long, sticky tongue they shoot out to capture prey. Aren’t amphibians fascinating? And also a bit strange So let’s remember the most important characteristics… Amphibians are vertebrates; they’re oviparous;
in the early stages of their life they live in water as larvae, but slowly they change
until they look just like their parents. This process of change is called metamorphosis. Amphibians are carnivores, so they have to hunt to eat; they have thin, smooth skin,
and breathe through their skin and with their lungs.
Amphibians are so interesting, aren’t they? Goodbye for now everyone, and don’t forget
to subscribe to Happy Learning!