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Annelid
 

Annelid

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    Annelid Annelid Presentation Transcript

    • Brandon Stubbs and Tony Reeves Period 7 5/19/09 Scientific name is Lumbricus terrestis Annelid
    • Classification
      • One of the subclasses is Hirudinea this subclass is the leaches they have a flattened body and a posterior sucker
      • The other subclass is Oligochaeta these are the worms like the night crawlers and earthworms
    • Body form
      • They are bilaterally symmetrical
      • They have a hydrostatic skeleton
      • They can be from 1 mm. to 3 m. in length
    • Reproduction
      • Sexual reproduction allows a species to better adapt to its environment.
      • Most polychaete worms have separate males and females and external fertilization.
      • Earthworms and other oligochaetes, as well as the leeches, are hermaphroditic and mate periodically throughout the year in favored environmental conditions.
      • http://encyclopedia.stateuniversity.com/pages/1499/annelid.html#ixzz0Gc3pG0V9&A
    • Feeding System
      • Annelids have a pharynx, mouth, crop ,esophagus, gizzard, intestine, and an anus
    • Circulatory system
      • Closed circulatory system
      • Worms have many hearts
    • Respiratory system
      • Gas exchange generally takes place through the skin but can occur though the gills
    • Environment
      • annelids are found in mostly wet environments terrestrial, freshwater
    • Contact with humans
      • Annelids came in contact by decomposistion
      • We use them for fishing
    • annelids
      • http://academic.scranton.edu/faculty/cannon/kidsjudge/kj04/collinsl2_files/T013733A.gif
      • http://www-tc.pbs.org/wgbh/nova/sciencenow/0305/images/01-hunt-11.jpg
      • http://www.senckenberg.de/images/content/forschung/abteilung/aquazool/mev2/me2_eingangsportal_2glyc1copyright.jpg
      • http://encyclopedia.stateuniversity.com/pages/1499/annelid.html#ixzz0Gc3pG0V9&A