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Marine Worms

Genny, Davis, Kyle, & Nicole

Davis Uhlig

on 27 April 2010

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Transcript of Marine Worms

Marine Worms Defintions Scientific & Common Names Feeding Methods Habitats Food Web Complex Worms Phylum Platyhelminthes Simple Digestive System Single opening- Anus and Mouth Simple Worms Phlyum Nemertea Slightly more complex, seperate opening for mouth and anus, & one way digestive system Carnivores Phylum Nematoda Flat worms Round worms Most complex of simple worms, one way digestive system with mouth and anus Mostly parasites that live in aquatic animals with some living in humans such as pinworms and hookworms Phylum Annelids Segmented bodies and complex structure Mouth Brain Nerve cord Simple hearts Arteries Veins Food tube Anus More than 15,000 species Class Polychaeta Tube worms living on coral reefs Flower-like antenna acting as filter-feeding organs Bristle worms, sponge worms, and fire worms all live on surface or below coral structures and when touched can burn and sting Video: Discovery Channel Reproduce sexually as hermaphordites Mostly feed on animals and other smaller life forms Occur in all major habitats Do not have a sketical circulartory or resportory system Have a circulartory system Reproduce asexually by fragmentation image: Food web most of the worms are brightly colored in order to frighten predators away How they live on the coral reefs "Young worms settle on coral heads and secrete a tube that kills the underlying polyps. New coral growth quickly surrounds the tube. Meanwhile the worm occupant secretes additional tube material to keep pace with the coral. The worm lives permanently in this tube. Only the brightly colored, feather-like feeding tentacles protrude from its lair." http://www.diveasia.com/reef-guide/sponges.htm Acorn Worms Live under the sand, they burrow their bodies under the sand. When they are underneath the sand the deposit coils of sand. Tube worms Have complex cuticle Feed on pretty much everything http://dsc.discovery.com/tv/life/
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