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Annelida. Alec Demitrus Owen Smith. Phylum Classes. Oligochaeta (Earthworms) Polychaeta (Marine worms) Hirudinea (Leeches). Habitat and Species. Ocean Freshwater Habitat Damp Soil 12,000 known species. External Anatomy . Internal Anatomy . Symmetry and Skeleton.

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Annelida

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Annelida

Alec Demitrus

Owen Smith


Phylum Classes

  • Oligochaeta

    • (Earthworms)

  • Polychaeta

    • (Marine worms)

  • Hirudinea

    • (Leeches)


Habitat and Species

  • Ocean

  • Freshwater Habitat

  • Damp Soil

  • 12,000 known species


External Anatomy


Internal Anatomy


Symmetry and Skeleton

  • Earthworms have bilateral symmetry.

  • Earthworms are invertebrates.


Life Cycle and Distinguishing Features

  • Hermaphrodites that lay cocoons that produce mini adults

    • Features include:

      • No obvious appendages

      • No antennas

      • Generally no difference in head or tail

      • Cylindrical bodies

      • Reduced head


Facts/Importance and Conservations Status

  • Earthworms don’t have lungs, they breath through their skin & can live under water for a while.

  • Leeches they are use in medical studies to remove blood cloaks


Bibliography

  • http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/I/Invertebrates.html

  • http://www.ento.csiro.au/education/allies/annelida.html

  • http://en.wikipedia.org/wiki/Annelid#Reproduction_and_life_cycle

  • http://en.wikipedia.org/wiki/Polychaete

  • Campbell, Neil. Biology, 8th edition. AP Edition ed. San Francisco: Pearson, 2008. Print.


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