1. Mammals
What are they?

2. There are over 5,000 types of mammals!

3. Mammals are vertebrates. They have backbones or spinal columns.

4. Mammals are warm-blooded.
These animals maintain a constant body temperature.

5. Mammals have hair or fur.

6. Mammals produce milk for their young.

7. Humans are mammals too!

8. These animals are cold-blooded. They are not mammals.

9. Let’s review

10. Works Cited
biology2/chapter/mammals/
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Flickr photos from Nik Borrow, Hal Trachtenburg, Aka Hige, vornaskoti, and Jason JonesRichard Smith, Bryant Olsen, George Lamson, Daniel Arndt, and jjj56 under license: