1. Mammals
Endothermic vertebrates that have hair and produce milk to feed their young

2. Skin & Glands skin is an organ that protects the body
it produces horns, claws, nails and even hooves
it contains many glands
mammary glands- produce milk
oil glands conditions the skin
sweat glands- remove wastes and keep cool
scent glands- mark territory, find mates, defense

3. Teeth specialized teeth incisors- bite and cut
canine teeth- grip and tear
premolars & molars- shred, grind or crush

4. Omnivores- eat plants & animals
Herbivores- eat only plants
carnivores- flesh of other animals

5. Mammals have hair thick hair
some just have a few hairs around their mouth
whiskers to help sense the environment
some are very specialized with quills or spines

6. Reproduction
mammals reproduce sexually
most give birth to live young

7. Types of Mammals 3 Groups
Monotremes- lay eggs with leathery shells & milk oozes from glands on their skin (platypus)
Marsupials- have immature young that crawl into an external pouch to develop
Placentals- embryos develop inside a females uterus (primates)

8. Review – Birds They are endothermic covered with feathers
lay eggs in hard shells that must be incubated until they hatch
specialized flight adaptations- feathers, light skeleton with hollow bones, efficient body systems
CURVED WINGS- CREATES AN UPWARD LIFT- AIR MOVES SLOWLY ACROSS
BONES- GIVE EXTRA STRENGTH & STABILITY, YET HOLLOW
FEATHERS- STRONG, LIGHTWEIGHT, SMOOTH
AIR SACS- KEEP A STEADY SUPPLY OF OXYGEN

9. BIRD WINGS
FLYING
SWIMMING
BALANCE WHILE RUNNING OR WALKING

10. BIRDS VS MAMMAL REPRODUCTION
BIRDS lay eggs that are fertilized internally
they are amniotic eggs that nourish the embryo
parents must incubate the egg
MAMMALS- give birth to live young
must feed milk to their young by mammary glands

11. BIRDS SPECILIZED DIGESTIVE SYSTEM
Food passes through the mouth to the crop
where it is moistened and stored.
It moves into the stomach where it is partially digested
From there it moves into the gizzard to be crushed and ground
Finally it moves to the intestines for the
last stage of digestion and the nutrients
enter the bloodstream of the bird