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Unit 9 Chapter 32 Mammals

Unit 9 Chapter 32 Mammals. What is a Mammal?. Hair , providing insulation, waterproofing, & camouflage

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Unit 9 Chapter 32 Mammals

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  1. Unit 9Chapter 32Mammals

  2. What is a Mammal? • Hair, providing insulation, waterproofing, & camouflage • Mammary glands, modified sweat glands, to nurse their young

  3. What is a Mammal? • Mammals have well-developed respiration & circulation to maintain high energy needs: • Diaphragm, breathing muscle expands chest to bring in more oxygen • Four-chambered heart

  4. What is a Mammal? • Mammals lifestyle is determined by: • Specialized teeth adapted to the type of food they eat • Specialized limbs adapted to methods of food-gathering

  5. Mammal Classification • Monotremes, egg-layers • Includes duck-billed platypus & spiny anteater

  6. Mammal Classification • Marsupials, pouched mammals • Includes Kangaroo, Koala, Opossum

  7. Mammal Classification • Placentals (90% of all Mammals) • Placenta is an organ that nourishes the young while inside the uterus (womb) • Gestation, period of time young develops in uterus; ensures offspring are protected from predators & environment

  8. Orders of Placental mammals • Artiodactyla (hoofed, with even number of toes) • Carnivora (specialized hunters)

  9. Orders of Placental mammals • Cetacea (adapted to aquatic environment) • Chiroptera (only mammal with true flight)

  10. Orders of Placental mammals • Insectivora (includes world’s smallest mammals) • Lagomorpha (includes some of the fastest runners, with 2 pairs of incisors)

  11. Orders of Placental mammals • Perissodactyla (hoofed,with odd number of toes) • Primates (superior intelligence, opposable thumbs)

  12. Orders of Placental mammals • Proboscidea (trunk-nosed) • Rodentia (largest order, gnawing incisors)

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