Animal Classification

    Cards (9)

    • Animal embryonic tissue layers
      • Endoderm
      • Mesoderm
      • Ectoderm
    • Acoelomate animals

      Do not have a coelom (body cavity) produced during preadult development
    • Pseudocoelomate animals
      Have a body cavity but it does not develop from splitting of the mesoderm embryonic tissue layer
    • Coelomate animals

      Have a body cavity lined with mesoderm cells
    • Protostomes
      Coelomates whose embryonic development makes a blastopore (first opening in the blastula) that later develops into a mouth
    • Deuterostomes
      Coelomates whose embryonic development produces a blastopore that later forms an anus, with a second opening forming the mouth
    • Segmentation allows animals to specialize certain segments, such as for antennae, eyes, claws, etc.
    • Types of body symmetry
      • Asymmetrical
      • Radial
      • Bilateral
    • Animals possess various body appendages like legs, tentacles and antennae that serve different functions
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