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Worms ( Lexy Bishop, Kellie Black, and Violet Lawson)

Worms ( Lexy Bishop, Kellie Black, and Violet Lawson). Flatworms, Roundworms, And Segmented worms. Flatworms. Phylum Name: Platyhelminthes Diversity: 20,000 species. General Characteristics of Flatworms. Bilaterally symmetrical Simplest animals- has three tissue layers

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Worms ( Lexy Bishop, Kellie Black, and Violet Lawson)

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  1. Worms (Lexy Bishop, Kellie Black, and Violet Lawson) Flatworms, Roundworms, And Segmented worms

  2. Flatworms Phylum Name: Platyhelminthes Diversity: 20,000 species

  3. General Characteristics of Flatworms Bilaterally symmetrical Simplest animals- has three tissue layers Move in several ways Nervous system is complex

  4. Body Support or Skeleton/Movement(Flatworms) Uses cilia on its ventral surface to search for food Muscles enable it to twist and turn Has eyes that spot light

  5. Reproduction and Digestion • Reproduction • Sexual- cross-fertilization • Asexual- fragmentation and regeneration • Digestion • In the gastro vascular cavity • Single opening • Nutrients distributed to cells that line cavity • Finely branched (The gastro vascular cavity)

  6. Examples of Animals in this Phylum Flukes Tapeworms

  7. Roundworms Phylum Name: Nematoda Diversity: 15,000 species

  8. General Characteristics of Roundworms Cyndrical Complete digestive tract Pointed heads Two Openings Tapered Tails

  9. Body Support or Skeleton/Movement Exoskeleton-cuticle Has to be shed Muscles are longitude Causing thrashing movements

  10. Reproduction and Digestion • Reproduction: • Sexual: separate males/females • Internal fertilization • Digestion: • Specialized regions • Complete digestion tract

  11. Examples of animals in this phylum Hookworms Pinworms Threadworms

  12. Segmented Worms Phylum Name: Annelida Diversity: 15,000 species.

  13. General Characteristics of Segmented Worms Segments similar Distinct head and tail Digested tract is not segmented Has a nerve cord and 2 main blood vessels Closed circulatory system

  14. Body Support or Skeleton/Movement Fluid-filled Two sets of muscles Circular and longitude

  15. Reproduction And Digestion • Reproduction • Sexual- the male and female structures are present • Internal fertilization • Digestion • Specialized regions • Complete digestion tract

  16. Examples of Animals in this Phylum Sandworms Earthworms Parasitic leaches

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