Invertebrates - Mesa Public Schools

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  • 1.Invertebrates 1 copyright cmassengale
  • 2.Invertebrate Phyla Sponges Cnidarians Platyhelminthes Nematodes Mollusks Annelids Echinoderms Arthropods 2
  • 3. Sponges (Porifera) Most primitive Cells relatively independent Mostly marine No Symmetry 3
  • 4.Sponges No mouth, stomachs, or other organs Most live in oceans Cannot move They stink a lot
  • 5.Cnidarians Mostly marine Radial Symmetry 5
  • 6.Cnidarians Jellyfish Hydra Coral 6 Sea anemone Portuguese Man-O-War
  • 7.Invertebrates with Stinging Cells They have tentacles They have a mouth They live on the ocean floor They shoot poisonous darts jellyfish Sea anemone coral
  • 8.Platyhelminthes Flatworms Bilateral symmetry Cephalization 8
  • 9.Planarian – freshwater flatworm 9
  • 10.Nematodes Tube-like digestive tract Roundworms! Mouth and anus No segmentation 10
  • 11.Worms They can grow back parts if they lose parts. Some worms can grow to 30 METERS long An earthworm has hairs on it to help it go through the dirt!!! Flatworm Segmented Roundworms                                                              
  • 12.Mollusks Clams, snails, squids Varied habitats Marine Freshwater Terrestrial 12
  • 13.Invertebrates with Soft Bodies They live on land and fresh water and ocean water. They make shells from minerals in the water Two shelled mollusks has a big foot to pull itself along squid snail octopus
  • 14.Annelids Segmented worms Common earthworm Leech 14
  • 15.Echinoderms Always marine Starfishes, sea urchins, sea lilies Spiny skin 15
  • 16.Invertebrates with Spiny Skins They have bodies with at least 5 sections They have suction cup feet to walk They use tubes to catch food to.
  • 17.Brittle Star – An Echinoderm 17
  • 18.Arthropods Joint-legged animals External skeleton Huge variation – mostly insects 18
  • 19.ArthropodsThere are 4 groups
  • 20.Arthopods They have keen sense organs They have exoskeletons. They have two or more segments
  • 21.Crustaceans They have five pairs of legs They live near or on the ocean floor Live on land and water They have antennae
  • 22.Arachnids Spiders mites and ticks. 4 pairs of legs Most live on land. Some live in fresh water They are called parasites.
  • 23.Insects Largest group of arthropods 3 pairs of legs 3 main body part sections 2 pairs of eyes Have mouths
  • 24.Millipedes & Centipedes Many body segments Live under rocks & dark places Really have less than 100 legs Protects itself by curling up Millipedes have 4 legs on each segment Centipedes have 2 legs on each segment millipede centipede
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