Sponges - PowerPoint PPT Presentation

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Sponges

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  1. Sponges Simplest animal Lives in salt water Two layers of cells

  2. Coral, sea flowers, and Jellyfish • Live in ocean • Have tentacles with stinging cells • Float to move – trap food • Coral stays in one place

  3. Flatworms • Flat bodies • Parasites • Tapeworms most common

  4. Round worms • Many species • Parasites • Hook worms found in soil • Round worms found in dirty water

  5. Segmented worms • Body is in segments – parts • Earth worms – tunnel through soil • Leeches – blood sucking – used in medicine

  6. Spiny skinned • Starfish, sea urchins, sea cucumbers, sand dollars • Starfish most well known, have tubed feet • Starfish turn stomaches inside out to eat clams • Starfish are not fish

  7. mollusks • Can live anywhere • Most have shells and soft bodies • Have muscular foot • Snails, clams, octopus, squid

  8. Arthopods • Having joined legs –section bodies • Ectoskeleton • Largest group of invertebrates • Includes insects,, centipedes, millipedes arachnids , crustaceans

  9. Insects • 6 legs • 3 body parts, head, abdomin, throax • Most have wings, some 2 sets • Pair of antenne on head

  10. Arachnids • 8 legs • 2 body parts, head – body • Spiders, ticks, horseshoe crabs

  11. Crustaceans • Considered an acrahnid • 8 legs, 2 body parts

  12. Centipedes and millipedes • Centipedes have one pair of legs per segment they eat insects Millipedes have two pair of legs per section decomposers

  13. Which one A or B is the millipede