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Mammals

Mammals. Bigfoot. Gray Wolf. Chimpanzee . Indo-Chinese Tiger . Beluga Whale . Prairie Dog. Hozilla. Basic Characteristics. Endothermic (pant/sweat/shiver) Hair Unique to mammals Insulation, waterproofing, communication, camouflage, protection.

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Mammals

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  1. Mammals Bigfoot Gray Wolf Chimpanzee Indo-Chinese Tiger Beluga Whale Prairie Dog Hozilla

  2. Basic Characteristics • Endothermic (pant/sweat/shiver) • Hair • Unique to mammals • Insulation, waterproofing, communication, camouflage, protection. • Nurse young: mammary glands (what are glands?) • Modified Limbs: for gathering food • Opposable thumbs to grasp.

  3. Body systems • Nervous: highly sophisticated intelligence; sense organs and brain. • Circulatory: four-chambered heart; high oxygen supply for energy. • Respiratory: lungs with a diaphragm (muscle to expand and contract chest) • Digestive: Teeth types help distinguish food sources • Incisors (grasping, holding, chiseling) • Canines (puncture/tear) • Molars (grind/crush)

  4. Groups of Mammals • Placental Mammals • Carries young inside body until development is almost complete • Protects offspring from predators and environment • Nourishment provided by placenta • Gestation (time of pregnancy) varies • Largest sub-class (approx. 95%)

  5. Group #2: Marsupials • Pouched Mammals/Marsupials • Short period of development in the body of mother, followed by longer period inside a pouch outside the mother’s body. • Majority found in Australia • Success rate not as high as placental

  6. Monotremes • Egg-laying mammals • Reproduction takes place through the presence of laying eggs • Only three species are monotremes: • Duck-billed platypus • Two-types of “spiny anteaters” • Found in Australia and New Guinea

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