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  1. Septa
    Thin membranous folds, divides coelom.
  2. Metamerism
    Repetition of body segments.
  3. Metamere
    A repeated segment found in metamerism
  4. Metanephridia
    Excretory system of the Annelids, removes waste from the blood as well as the coelomic fluid.
  5. Parapodia
    Appendages used in respiration and locomotion.
  6. Acicula and setae
    Reinforce parapodia.
  7. Circular muscle and Longitudinal muscle
    Allow locomotion through peristaltic waves.
  8. Oblique muscles
    Create elliptical motion for parapodia, causing propulsion.
  9. Class Oligochaeta
    Earthworm; Freshwater and terrestrial, only 4 pairs of setae per segment.
  10. Class Polychaeta
    Clamworm; Marine only worms, a large amount of setae per segment, makes up almost 2/3rds of the phylum.
  11. Class Hirudinea
    Leeches; Freshwater and marine, parasitic.
  12. Respiratory capillaries
    Small blood vessels that do gas exchange, found on the parapodia.
  13. Clitelum
    Membranous section of the earthworm, forms cocoon for eggs.
  14. Egg capsule
    Mucus like secretion of the clitelum, houses eggs.
  15. Seminal vesicle
    Stores sperm cells created by the earthworm, used to deliver to another worm.
  16. Seminal receptacle
    Used to store sperm from other worms for a short time.
  17. Oviduct
    Eggs are secreted here into the egg capsule.
  18. Gizzard
    Where the worm churns the dirt it eats, mechanical digestion.
  19. Typhlosole
    Adds surface area and rigidity to the intestine, runs the length of the intestine.
  20. Dorsal vessel
    Blood vessel that pumps blood via peristaltic motion forward toward anterior of the worm.
  21. Aoritc arches
    Acts as the heart of the earthworm, pumps blood through the ventral vessel.
  22. Vetral vessel
    Blood is distributed throughout the body by this vessel.
  23. Anterior and posterior suckers
    Found on leeches only, they attach themselves to hosts using these.
Card Set:
2013-02-28 01:46:19

Phylum Annelida featuring Oligochaeta, Polychaeta, and Hirudinea
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