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Mammals

Mammals. What Makes a Mammal?. 5 Things All Mammals Have in Common: All breathe air All have 4-chambered heart All are endotherms (warm-blooded) All have mammary glands All have hair. Endotherms (Warm-Blooded). Mammals maintain a constant body temp Humans keep body at 98.6 

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Mammals

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  1. Mammals

  2. What Makes a Mammal? • 5 Things All Mammals Have in Common: • All breathe air • All have 4-chambered heart • All are endotherms (warm-blooded) • All have mammary glands • All have hair

  3. Endotherms (Warm-Blooded) • Mammals maintain a constant body temp • Humans keep body at 98.6 • High metabolic activity keep temp high • Hair helps mammals keep warm • Sweat glands help cool down

  4. Feeding - Jaws • Jaws & Teeth help tell us what an animal eats • Molars = herbivores (plant eaters) • Canines = carnivores (meat eaters) • Incisors = teeth used for cutting or tearing

  5. Circulation • 4-Chambered Heart • Left Atrium • Blood in from lungs • Left Ventricle • In from left Atrium; out to body • Right Atrium • Blood in from body • Right Ventricle • In from right Atrium; out to lungs

  6. Diversity of Mammals • Monotremes = egg laying mammals • Marsupials = raise young in external pouch • Placental Mammals • Raise embryo in a placenta • Nutrients, Oxygen, Carbon Dioxide, & Waste exchanged through placenta

  7. Primates • Adaptations: • Binocular Vision • Well-developed Brains • Long fingers and toes • Arms that rotate around shoulder • Homonoids: great apes • Include Homo sapiens, gorillas, chimpanzees • Have opposable thumbs

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