1. Class Mammalia

2. HAIR Mammalian Characteristics ENDOTHERMIC-
Mammals produce body heat internally through metabolism.
All mammals have hair.
Insulates the body against heat loss.
Serves as camouflage
HAIR
Mammary glands – nourish young
Nutritious fluid that contains fats,
proteins, sugars and antibodies!

3. Four-Chambered Heart Separated ventricles keep deoxygenated blood from
diluting oxygenated blood.
Allows more efficient
pumping of blood
through both circuits
of circulatory system.

4. Monotremes Duck-billed Platypus Echidna
• Only egg laying (oviparous) mammals
• Mothers secrete milk through
skin (no nipples).
• Baby sucks milk from the fur.

5. Marsupials
• Opossums, kangaroos, tasmanian devils and koalas are some examples.
• Give birth to live young ( viviparous).
• Premature young complete embryonic development while nursing in a maternal pouch.

6. Eutherian (Placental) Mammals
• Longer period of pregnancy by completing embryonic development within the uterus.
• Placental young are nourished through a placenta.
• Fossil evidence suggests eutherians and marsupials diverged from a common ancestor 80 to 100 million years ago

7. Mammals Have Specialized Teeth
Respiratory System
Lungs of mammals have a larger surface area available for gas exchange than all other animals.
The Diaphragm is a sheet of muscle below the rib cage. Contraction of the diaphragm draws air intothe lungs.
Carnivores, such as this lion skull, have large, sharp incisor and canine teeth that are able to cut and tear flesh.
Mammals Have Specialized Teeth
Incisors
- cut
Canines
- grip
- puncture
- tear
Herbivores, such as the horse, have flat teeth that are useful for grinding grass and grain, which are the staples of their diet.
Premolars
- shear
- shred
- cut
- grind
Molars
- grind
- crush
- cut

8. Baleen is thin plates of
fingernail-like material
that hang from the
roof of the mouth.
Baleen whales,
such as the
blue whale, do
not have teeth.

9. Nervous System & Sense Organs
The brain of a mammal is about 15 times
heavier than the brain of a similarly sized fish,
amphibian or reptile.
Enlargement of the cerebrum accounts formost of the size increase
The cerebrum Evaluates input from sense organs, controls movement, and initiates and regulates behavior.

10. Using a process called echolocation, bats emit high frequency sound waves, which bounce off objects, and then they analyze the returning echoes to determine the size, distance, direction and speed of the object.

11. TYPES OF MAMMALS (ORDERS)
Insectivora
Chiroptera
Carnivora
Primates

12. Perissodactyla
Proboscidea
Artiodactyla

13. Xenarthra
Cetacea

14. Rodentia
Lagomorpha