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Phylum Nemertea

Phylum Nemertea. http://cdn-write.demandstudios.com/upload//3000/900/20/4/33924.jpg. Name from Nemertes - sea nymph. http://www.artmagick.com/images/content/falero/hi/falero15.jpg.

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Phylum Nemertea

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  1. Phylum Nemertea http://cdn-write.demandstudios.com/upload//3000/900/20/4/33924.jpg Name from Nemertes- sea nymph http://www.artmagick.com/images/content/falero/hi/falero15.jpg Medusa was a sea nymph from Greek mythology who was very beautiful. She angered Athena, who turned her into a hideous monster with hair of snakes.

  2. AKA- Proboscis worms/Ribbon worms (long proboscis held in sheath called a rhynchocoel) • Commonly found in mud and sand • Free living- carnivorous (eat other worms and crustaceans) • Complete digestive tract! (mouth & anus) • Circulatory system of blood vessels- but no heart • Dioecious- external fertilization • Glide on mucus (with help of cilia) • Includes some of the longest known invertebrate animals (30 m+)

  3. http://www.ucmp.berkeley.edu/nemertini/baseodiscus.jpg http://www.mbari.org/benthic/images/Macrofauna_2/nemerteasp2_prob.jpg http://2.bp.blogspot.com/_LbccUVbSRd8/SKM-SaDr2KI/AAAAAAAACXs/g8fGw-jGgYo/s400/colorful+nemertean+worm.jpg

  4. http://www.seamuse.com/rhyncocoela.jpg http://www.emilydamstra.com/illustrations_big/enopla_predation.jpg

  5. Phylum Gastrotricha • Free living in marine and freshwater (bottom dwellers) • Tiny! (only 0.01 - 4 mm) • Usually have a forked tail (with adhesive glands) • Brain! • Digestive system: mouth/pharynx, stomach, intestine, anus (*however- digestion is mostly extracellular) • Cilia for movement • Marine species = sexual • Freshwater species = asexual

  6. http://protist.i.hosei.ac.jp/PDB/Images/Multicell/Gastrotricha/Polymerurus_5.jpghttp://protist.i.hosei.ac.jp/PDB/Images/Multicell/Gastrotricha/Polymerurus_5.jpg http://4.bp.blogspot.com/_Ne3bhx2j74s/ShmytR9raKI/AAAAAAAAAiY/m58tQvkIvZU/s400/gastrotrichIMGP9367_edited-1.jpg http://www.microscopy-uk.org.uk/mag/imgsep03/gastrotricho.jpg

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