1. All mammals breathe with lungs.
2. Lungs are the primary organs of the respiratory system in mammals.
3. Lungs take oxygen from the air and transfer it into the bloodstream.
4. A mammal is a warm blooded animal. The different temperatures are shown here.
5. Warm blooded means they can make their own body heat even in cold habitats.
6. Every mammal has hair or fur on some part of their body.
7. Mammals give birth to live young. Here a cow is giving birth,
8. A female mammal produces milk from mammary glands to feed their young.
9. Mammals have four limbs with digits ending in claws, nails or hooves.
10. Except for whales that are marine mammals and live in the sea.
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