Friday, January 7, 2011


The class Amphibia includes frogs, toads, salamanders, newts and caecilians. Amphibians are characterized by a glandular skin without external scales, by gills during development (and in adulthood in some), and by eggs that may have jelly coats. A amphibian reproduces sexually. The eggs are fertilized outside of the mother's body. The mother lays the eggs which are in a jellylike layer. The father immediately comes by and fertilizes them. The frog's eggs are black and white. The young frog is called a tadpole and it hangs on to plants. Young amphibians tend to resemble small fish. A amphibian is cold blooded so its body temperature is the same as its surrounding environment. A amphibian has a thin skin that is moist.


  1. 1. Most amphibians are able to exchange gasses with the water or air via their skin.

    2. For the purpose of reproduction most amphibians require fresh water.

    3. Mostly live both in the water and on land.

  2. 1) Most amphibians lives in fresh water

    2) An amphibian goes through metamorphosis as it grows from a baby to an adult.

    3) The amphibian, because it must be moist, sometimes hides out in the summer as if hibernating. This is called estivation. It also buries itself in the mud during the winter and hibernates to prevent it from freezing as it is cold blooded.