Have hair Use milk for young through Mammary glands Four-chambered heart Endothermic.

• Have hair• Use milk for young

• through Mammary glands• Four-chambered heart• Endothermic

• Temperature control• Layer of fat under skin• Sweat glands• together homeostasis

• Feeding• Specialized teeth

• Circulation• Highly specialized four-chambered heart

• Respiration• Lung intake regulated by diaphragm

• muscle around lungs that causes them to inflate

• Excretion• Kidney function to filter out urea (waste) and regulate water levels in body

• Response• Cerebral Cortex!!!

• Allows for higher-level though• ex. Reading, decisions, etc.

• Movement• back with flexible vertebrae • specialized pelvic girdles for specific movements

• 3 types, classified by way animals develop• Monotremes

• egg-laying mammals• duckbilled platypus

• Marsupials• development finished in puch

• kangaroo• Placental mammals

• all that give birth to live young• horse, whale, mouse, dog, primates

• Have a well-developed cerebrum • allows for more complex behavior• fingers, toes• arms with ball-in-socket joint that can rotate freely• binocular vision (suggests need for depth perception)

• Genus Homo• fossils show in Africa about 2.5 million years ago

• Homo sapiens• “Out of Africa” model

• evolved in Africa 200,000-150,000 years ago• left Africa in many migrations• supported by mitochondrial DNA samples showing a common ancestor