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

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Presentation transcript:

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

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

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 a.Incisors (grasping, holding, chiseling) b.Canines (puncture/tear) c.Molars (grind/crush)

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

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

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