1. VERTEBRATES There are five groups of vertebrates: Fish Amphibians
They have backbone/skeleton
The body is divided in: head, trunk and limbs (except snakes)
There are five groups of vertebrates:
Fish
Amphibians
Reptiles
Birds
Mammals

2. Fish They have: head, trunk, fins and tail
The body is covered with scales
They live in water (oceans or fresh water)
They breathe through gills
They are oviparous
They are cold blooded
They have gas/air bladder
There are two groups:
Cartilaginous (Sharks and rays): the skeleton is not made of bone, only teeth are bony. The fins are fleshy.Live mainly in the ocean
Bony : they have thin fins

3. Amphibians They have: head, trunk and 4 legs (some have tails)
The skin is wet and have no scales
When babies they live in water and breathe through gills. As adults they live on land and breathe through lungs. This change is called metamorphosis
They are oviparous
They are cold blooded

4. Reptiles
They have: head, trunk, limbs (4 legs, except snakes) and tail
Their body is usually covered with hard scales or a shell
Most live an land but some live in water
They are oviparous
They are cold blooded
They breathe through lungs
There are four groups:
1.crocodiles lizards snakes turtles

5. Birds They have: head, trunk, limbs(2 legs & 2 wings) and tail
Their body is covered with feathers
They are oviparous
They are warm blooded
They breathe trough lungs
They have hollow bones

6. Mammals They have: head, trunk and limbs
Their body is covered with hair or fur
They are viviparous. Babies drink milk from their mothers
They are warm blooded
They breathe through lungs