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

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

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)

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

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.