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Mammals

Published on Nov 25, 2015

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PRESENTATION OUTLINE

1.

MAMMALS

  • Are a clade of endothermic amniotes distinguished from reptiles and birds by possession of
  • Hair, 3 middle ear bones mammary glands in females and a neocortex
2.

CHARACTERISTICS

  • All are warm blooded and are born alive
  • Have hair or fur and are all vertebrates
  • Have lungs to breathe air
  • Feed milk to their babies
3.

TRAITS

  • Specialized dentition that gives them the ability to tear and grind up their food
  • Synapsid skulls which makes them one of the closest relations to synapsids
  • Have one tooth-bearing bone the dentary
4.

REPRODUCTION

5.

TYPES OF MAMMALS

  • Monotremes, marsupials and placental mammals
  • Monotremes lay eggs marsupials carry their young in a pouch
  • Placental mammals carry their young in the womb until birth
6.

MONOTREMES

  • Monotremes lay eggs
  • Like a duck-billed platypus
  • All indigenous to Australia and New Guinea
  • Besides the platypus comprise of 4 species of echidnas
7.

MARSUPIALS

  • Carry the young in a pouch like a kangaroo
  • Give live birth
  • Give birth to relatively undeveloped young
  • Reside mostly in the Southern Hemisphere
8.

PLACENTAL MAMMALS

  • Carry young in womb till birth like humans
  • Give live birth
  • 4000 species mostly rodents and bats
  • Live in land and in the water (whales)

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