Animal kingdom
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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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Animal Kingdom

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Animal kingdom

Animal Kingdom


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


Animal kingdom

  • Nerve cells develop separating sponges (Porifra) from the rest of the animal phyla


Animal kingdom

  • Radial symmetry separates the Cnidaria phyla from the rest which exhibit bilateral symmetry


Animal kingdom

  • Other phyla separated by similarities in embryonic development

    • protostomes (invertebrates)

    • deuterostomes (vertebrates [chrodata]; and echinodermata b/c of similar embryonic development)


Animal kingdom

  • 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


Animal kingdom

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


Animal kingdom

HWK

  • Read pg 96-99

  • Questions #1,3,4,5


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