bio cards

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Author:
Anonymous
ID:
60183
Filename:
bio cards
Updated:
2011-01-17 00:27:34
Tags:
bio cnidarians
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Description:
bio cnidarians
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  1. what is the anterior?
    top/head
  2. what is the posterior?
    bottom/feet
  3. what is the ventral?
    front/underside
  4. what is the dorsal?
    back
  5. what is proximal?
    toward the centre
  6. what is distal?
    toward the side
  7. what is assymetry?
    • -no axis of symmetry
    • -sac like body plan
    • -sessile
  8. what is radial symmetry?
    • -several axes of symmetry
    • - sac-like body plan
    • -sessile for part of life
    • -allows reaching in all directions
  9. what is bilateral symmetry?
    • -one axis of symmetry
    • -tube-within-a tube body plan
    • -motile in one direction, leads to cephalization
  10. what is triploblasty?
    3 layers of tissue:

    • endoderm
    • mesoderm
    • ectoderm
  11. do porifera have triploblasty?
    no, they lack an endoderm, mesoderm and ectoderm
  12. which are diploblastic?
    cnidarians
  13. which are triploblastic?
    worms

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