1. Vertebrates

2. Vertebrates
Animals with an internal skeleton made of bone are called vertebrates.

3. Vertebrates Well-developed internal skeleton Highly developed brain
Have advanced nervous system
Outer covering of protective skin

4. Vertebrates 2% of the animal species are vertebrates.
There are 57,739 species of vertebrates.

5. Vertebrates Classified into five groups: Fish Amphibians Reptiles
Birds
Mammals

6. Fish
Fish come in more varieties than any other group of vertebrate animals.

7. Fish
There are 32,000 different species of fish.

8. Fish
There are three major types or classes of fish including jawless, cartilaginous, and bony fish.

9. Jawless Fish

10. Cartilaginous Fish

11. Spiny Fish

12. Amphibians
Amphibians are a class of animals that live the first part of their lives in the water and the last part on the land.

13. Amphibians
When they hatch from their eggs, amphibians have gills so they can breathe in the water and have fins to help them swim. Later, their bodies change, growing legs and lungs enabling them to live on the land.

14. Amphibians There are 3 basic types of amphibians:
Newts and salamanders
Frogs and toads
Caecilians

15. Newts and Salamanders

16. Frogs and Toads

17. Caecilians

18. Reptiles
Reptiles have been around for 300 million years, even during the dinosaur age. 

19. Reptiles The most common reptiles include: Alligators Crocodiles
Lizards
Snakes
Tortoises
Turtles 

20. Reptiles
 The most noticeable feature of reptiles are the scales that cover their body.

21. Reptiles
The majority of reptiles lay eggs to give birth to their young.

22. Reptiles
Reptiles are often called cold-blooded because they can't regulate their own body temperature.

23. Birds
There are over 8,000 species of birds.

24. Birds Birds have 3 major differentiating characteristics:
Wings for flight
Feathers
And a beak rather than teeth.

25. Birds
Birds have adapted their vertebrate skeleton for flight. Their bones and skull are very thin, making their bodies extremely light.

26. Birds
To support flight also required other changes to their skeleton. Obvious changes are the addition of wings.

27. Birds
The claws and muscles of a bird's foot are designed to lock and hold onto a perch even while the bird is sleeping.

28. Mammals
Mammals have several unique characteristics that differentiate them from other animals. Most mammals have hair, or fur, covering their body.

29. Mammals
They are also capable of regulating their body temperature. The mammals metabolism controls heat production, and the sweat glands help cool the body.

30. Mammals
One other difference is that mammals give birth to fully formed babies, and the female mammals produce milk to feed their young.