1. Mammals (outline) Mammal characteristics Body systems Types of mammals
-what is a gland and types of
-teeth types
-omnivore-carnivore-herbivore
-hair
Body systems
Types of mammals
Importance of mammals

2. produce milk to feed their young care for their young
are endothermic
vertebrates
have hair or fur
produce milk to feed their young
care for their young
Characteristics of Mammals

3. Mammal Body Systems System Description Circulatory
Four –chambered heart
Oxygen-filled blood travels through blood vessels
Respiratory
Lungs made up of millions of air sacs (alveoli).
These sacs (alveoli) allow greater exchange of oxygen and carbon dioxide
Nervous
Made up of brain, spinal cord, and nerves
Brains involved in learning and controlling muscles
Digestive
Vary depending on the kinds of foods the particular mammal eats (herbivores have long digestive tracts compared to carnivores)

4. Fill in the Three Types of Mammals
M_______________ - Lay eggs with leathery shells
M_______________ - Give birth to immature young that usually crawl into pouch
P________________ - An embryo completely develops inside the female’s uterus

5. Townsend Squirrel Mystery
Use Graph A to answer the following questions.
What do you observe happening?
What do you notice about the Townsend ground squirrel population in April and May?
What do you notice about the ground squirrel population in July?
What do you think caused this drop in population?
What might happen to the squirrel?
What do you notice about the prairie falcon population in April and May?
What do you notice happening to the falcon population in July? What do you think caused this population decline?
What could have caused the change? State your hypothesis.