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Mammals - PowerPoint PPT Presentation


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Mammals. What Makes a Mammal?. 5 Things All Mammals Have in Common: All breathe air All have 4-chambered heart All are endotherms (warm-blooded) All have mammary glands All have hair. Endotherms (Warm-Blooded). Mammals maintain a constant body temp Humans keep body at 98.6 

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Presentation Transcript
what makes a mammal
What Makes a Mammal?
  • 5 Things All Mammals Have in Common:
    • All breathe air
    • All have 4-chambered heart
    • All are endotherms (warm-blooded)
    • All have mammary glands
    • All have hair
endotherms warm blooded
Endotherms (Warm-Blooded)
  • Mammals maintain a constant body temp
    • Humans keep body at 98.6
  • High metabolic activity keep temp high
  • Hair helps mammals keep warm
  • Sweat glands help cool down
feeding jaws
Feeding - Jaws
  • Jaws & Teeth help tell us what an animal eats
  • Molars = herbivores (plant eaters)
  • Canines = carnivores (meat eaters)
  • Incisors = teeth used for cutting or tearing
circulation
Circulation
  • 4-Chambered Heart
    • Left Atrium
      • Blood in from lungs
    • Left Ventricle
      • In from left Atrium; out to body
    • Right Atrium
      • Blood in from body
    • Right Ventricle
      • In from right Atrium; out to lungs
diversity of mammals
Diversity of Mammals
  • Monotremes = egg laying mammals
  • Marsupials = raise young in external pouch
  • Placental Mammals
    • Raise embryo in a placenta
    • Nutrients, Oxygen, Carbon Dioxide, & Waste exchanged through placenta
primates
Primates
  • Adaptations:
    • Binocular Vision
    • Well-developed Brains
    • Long fingers and toes
    • Arms that rotate around shoulder
  • Homonoids: great apes
    • Include Homo sapiens, gorillas, chimpanzees
    • Have opposable thumbs