science

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Author:
westerngal95
ID:
112269
Filename:
science
Updated:
2011-10-26 00:06:48
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science
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science
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  1. What type of symmetry do flatworms have?
    Bilateral Symmetry - can divide into mirror halves
  2. Anterior, posterior, dorsal, ventral
    head, tail, back, belly
  3. Advantages of Bilateral Symmetry
    moving and active feeding
  4. Organisms that belong to Class Turbellaria
    non-parasitic flatworms, live in water
  5. how do planaria get around?
    ventral side covered with cilia, creat a goo path and cilia moves it forward
  6. planaria get rid of waste?
    waste diffuses out the body wall.
  7. planaria use for osmoregulation?
    Flame Cells-flagulla push water into a system of tubles then out the organism.
  8. sensory organs
    • ocellia- eyespots
    • Auricles-protrutions on the head
  9. Flukes belong to what class?
    Class Trematoda
  10. What is a parasite?
    organism that lives in or on another organism
  11. How do flukes feed?
    have suckers that attatch the fluke to the host
  12. 4 characteristics flatworms have
    • 1) bilateral symmetry
    • 2) cephalization-sense organs & nevous control
    • 3)triploblastic - 3 cell layers
    • 4) Acedomate- no open space
  13. phylum flatworms belong to
    Phylum Platyhelmenthese
  14. gastrovascular cavity of a planaria
    • 3 trunks, 1 anterior, 2 posterior
    • trunks branch to increase surface area
  15. How does planaria gather their food?
    pharynx extends out the mouth for feeding
  16. Triploblastic
    3 cell layers. mesoderm produces more advanced organs
  17. Class Turbellaria
    Class Trematoda
    Class Cestoda
    • Free living, non-parasistic flatworms
    • parasitic flatworms, either interngal or external
    • parasistic, internal

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