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

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Unit 9 chapter 32 mammals l.jpg

Unit 9Chapter 32Mammals


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What is a Mammal?

  • Hair, providing insulation, waterproofing, & camouflage

  • Mammary glands, modified sweat glands, to nurse their young


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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


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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


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Mammal Classification

  • Monotremes, egg-layers

  • Includes duck-billed platypus & spiny anteater


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Mammal Classification

  • Marsupials, pouched mammals

  • Includes Kangaroo, Koala, Opossum


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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


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Orders of Placental mammals

  • Artiodactyla (hoofed, with even number of toes)

  • Carnivora (specialized hunters)


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Orders of Placental mammals

  • Cetacea (adapted to aquatic environment)

  • Chiroptera (only mammal with true flight)


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Orders of Placental mammals

  • Insectivora (includes world’s smallest mammals)

  • Lagomorpha (includes some of the fastest runners, with 2 pairs of incisors)


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Orders of Placental mammals

  • Perissodactyla (hoofed,with odd number of toes)

  • Primates (superior intelligence, opposable thumbs)


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Orders of Placental mammals

  • Proboscidea (trunk-nosed)

  • Rodentia (largest order, gnawing incisors)


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