1. Diversity of Mammals

2. Placental Mammals
Animals that develop in the uterus of the mother. All nutrients, oxygen, carbon dioxide, and waste are exchanged between the embryo and mother through the placenta.
Benefits
Protection
Nourishment
Oxygen movement
Removing Wastes
The time a mammal is in the uterus is called gestation.

3. Order Lagomorpha Rabbits, pikas, hares Hind legs for jumping
Long front teeth that grow through the whole life

4. Order Primates Very intelligent
Apes (chimps, orangutans, gorillas, and gibbons), lemurs, monkeys, and humans

5. Order Carnivora
Cats, cat-like animals, dogs, dog-like animals, seals, sea lions, walruses, bears, skunks, and weasels
Have long, pointed canines and incisors
Have strong jaws
Have some claws

6. Order Rodentia Porcupines, beavers, chipmunks, mice, and rats
Largest order
Live everywhere
Razor sharp teeth to gnaw on hard seeds, bark, twigs, and roots

7. Order Cetacea Dolphins, porpoises, and whales Very intelligent
Complex brains
Little or no hair
Breathe through blow holes

8. Order Sirenia Manatees and dugongs Live in tropical waters
Often injured by speed boats
Can stay underwater for 15 minutes
Breath on the surface
Have tails and front flippers
Also called sea cows

9. Order Insectivora Moles Good diggers Poor eyesight Eat insects
Pointed snouts and sharp claws

10. Order Perissodactyla
Includes horses, rhinoceroses, and tapirs

11. Order Edentata Armadillo, sloths, and anteaters
Have plates of bones to protect their body
Good diggers

12. Order Artiodactyla
Hippos
Usually vegetarians

13. Order Chiroptera Bats Good pollinators Eat fruit or insects
Use echoes to locate things
Only group of mammals to fly

14. Order Proboscidea Elephants
One pair of incisors that are modified into tusks
Have trunks

15. Marsupials Opossums, kangaroos, and kolas
The young develops for a short time in the body and then a period of time in a pouch made of skin and hair

16. Monotremes Platypus and Echidnas Mammals that lay eggs
Found only in Australia, Tasmania, and New Guinea