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Annelids

Annelids. Group members, Aurora, Jake, Julia. Phylum: Annelida. This is mainly segmented worms, such as Earthworms or leeches. Symmetry. Annelids are bilateral, which means it looks the same on both sides of the body. Feeding.

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Annelids

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  1. Annelids Group members, Aurora, Jake, Julia

  2. Phylum: Annelida This is mainly segmented worms, such as Earthworms or leeches.

  3. Symmetry Annelids are bilateral, which means it looks the same on both sides of the body.

  4. Feeding Annelids are detritivores which feeds on dead organisms/organic matter. -Free Living -Independent feeding -Example: Earthworms Parasitic -Lives off a host -Example: Leeches

  5. Circulation They have a closed circulatory system.

  6. Excretion • Digestive waste exits through the anus • Nitrogenous wastes are eliminated by nephridia • Invertebrate organ that functions like vertebrate kidneys

  7. Response Annelids have Ganglia -Ganglia: a network of cells forming a nerve center in the nervous system of an invertebrate.

  8. Movement Moves by contracting muscle cells Two major sets of muscles: • Longitude muscles (run from anterior to posterior) • Circular muscles (coil inside the worm) • They also have tiny hair like structures called setae which grips the dirt and helps the worms move.

  9. Reproduction • Annelids are capable of both sexual and asexual reproduction • Worms and some leeches have a clitellum which hold their reproductive parts

  10. Respiration Annelids respire by either gills, lungs, or by diffusion - Diffusion: a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration.

  11. Names of Classes/Examples The three main classes are: Oligochaetes- freshwater and earthworms Polychaetes- marine worms Hirudineans- leeches.

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