Unit 9 Chapter 32 Mammals

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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 worlds
  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)