6º Summary for fish and amphibians

                                                               Friday, 20th October 2017

FISH

Characteristics:

• They live in the water.
• They have their bodies covered by scales.
• They are oviparous.
• They have got fins to move.
• They extract oxygen from the water by gills.

Types of fish:

• Bony fish: with bones.
• Cartilaginous fish: without bones, they have cartilage.

AMPHIBIANS

Characteristics:

• They live in land but they need water to get wet their skin.
• They have got gills when they are young, but later they use lungs.
• They are carnivores with a long tongue.
• They are oviparous.

Types of amphibians:

• Anuras: without tails (frogs and toads).
• Urodelas: with tails (salamanders).