Download
1 / 39
410 likes | 556 Views
Amphibians and Reptiles. Characteristics, Classes and Reps.
E N D
Amphibians and Reptiles Characteristics, Classes and Reps
The skin of amphibians is very thin and must always be kept wet because amphibians breathe through their skin. The do have lungs, but their lungs are small and are not used very much. Fertilization of the eggs is external, taking place in the water. The eggs are covered with jelly to protect them. The larvae, called tadpoles, are aquatic. They slowly change (metamorphose) into the adult amphibian which lives on land but always near water. Examples of amphibians are the frog and the newt.
Amphibians ~ Who • Apoda - Caecilians • Caudata - Salamanders and newts • Anura – Frogs, Toads, Treefrogs
Legless amphibians Gymnophiona (= Apoda): Caecilians. Caecilians are an amphibian order which includes many wormlike creatures.
It’s the skin of the Blue Dart Frogs that contains the poison – enough to kill up to 20 adult humans! The strawberry poison frog is one of a number of species of amphibians and reptiles declining in forests of Costa Rica
The body of a reptile is covered in hard scales. Reptiles live on land, although many of them swim well and may feed in water, such as some snakes and lizards. They breathe using lungs. When male and female mate fertilization is internal. The female lays soft-shelled eggs which are often buried in sand or in the earth to protect them while the young develop inside. Examples of reptiles are crocodiles, snakes and lizards.
