Mammals

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Mammals

• Pasterik 2006

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Classification

• Kingdom Animalia----Phylum Chordata------Subphyl
  um Vertebrata---------Class Mammalia

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About 16 Orders in three groupsEgg-Laying
Mammals, Pouched Mammals, Placental mammals
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Characteristics

• Hair
• Endothermy
• 4 chambered heart
• Diaphragm (muscle to aid breathing)
• Most nourished by a placenta
• Mammary glands produce milk

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Gestation - length of time within the uterus. (9
months for humans)Weaning - time at which young
stop drinking milk.
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Marsupials - Order Marsupiala

• Most groups live in Australia - mainly because
  Australia split from the main continent and
  became isolated, the species there are almost all
  marsupials, though humans have "imported" other
  groups now.
• Opossum - the only marsupial that exists
  naturally outside of Australia.

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Kangaroo
Wombat
Phalanger
Koala
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