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Animal Kingdom. Characteristics. Heterotrophic, multicellular , eukaryotes Mobile (most) Require oxygen for cellular respiration. Evolutionary Past. Common ancestor (700 million yrs ago) colonial, flagellated, protist

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Presentation Transcript
characteristics
Characteristics
  • Heterotrophic, multicellular, eukaryotes
  • Mobile (most)
  • Require oxygen for cellular respiration
evolutionary past
Evolutionary Past
  • Common ancestor (700 million yrs ago)
    • colonial, flagellated, protist
  • Cell folded in on itself creating a digestive cavity and giving rise to first animal
slide6
Other phyla separated by similarities in embryonic development
    • protostomes (invertebrates)
    • deuterostomes (vertebrates [chrodata]; and echinodermata b/c of similar embryonic development)
slide7
Protostomes include:
    • Platyhelminthes (flatworms)
    • Rotifera (rotifers)
    • Mollusca (molluscs)
    • Annelida (segmented worms)
    • Nemtoada (round worms)
    • Arthropoda (insects, jointed limbs)
cell specialization
Cell Specialization
  • Stem cells (undifferentiated cells) are able to develop into all the specific types of cells (differentiated cells) found in an organism.
  • Tissues are groups of differentiated cells acting together
distinguishing phyla
Distinguishing Phyla
  • Germ layer similarites
    • 3 embryonic germ layers:
    • Ectoderm (outer layer)
    • Mesoderm (middle layer)
    • Endoderm (inner layer)
    • Not all phyla have all layers
      • Ex. Cnidera do not have a mesoderm
slide10
Ectoderm develops into:
  • Shells, scales, feathers, hair, nails

Mesoderm develops into:

  • Circulatory, reproductive, excretory, muscular systems, and body cavity

Endoderm develops into:

  • Inner lining of gut and respiratory system
distinguishing phyla1
Distinguishing Phyla
  • Presence of a body cavity (coelum) or not
    • Ex. Flatworms (Platyhelminthes) do not have a coelum
slide12
HWK
  • Read pg 96-99
  • Questions #1,3,4,5
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