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Arthropods and Echinoderms

Arthropods and Echinoderms. Invertebrates. Invertebrates are animals that have no backbone. There are ____ kinds of invertebrates. six. You have already learned about four kinds. Now, let's learn two more!. 1. Sponges. 2. Cnidarians. 3. Worms. 4. Mollusks. Echinoderms.

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Arthropods and Echinoderms

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  1. Arthropods and Echinoderms

  2. Invertebrates Invertebrates are animals that have no backbone. There are ____ kinds of invertebrates. six You have already learned about four kinds.

  3. Now, let's learn two more! 1. Sponges 2. Cnidarians 3. Worms 4. Mollusks

  4. Echinoderms * Echinoderms are __________, _______, __________, ________, ____________, and ____________. * Echinoderm means _______________. All echinoderms have spiny skin.

  5. Echinoderms • There are ______ characteristics of echinoderms. • All echinoderms have: • Spiny skin • An internal skeleton • A five part body • A water vascular system • Tube feet

  6. Characteristics of Echinoderms * All echinoderms have __________. Some of them have small hair-like spines, like the starfish. * Some echinoderms have long spines, like the sea urchin.

  7. Characteristics of Echinoderms * The internal skeleton of an echinoderm is made of _______________________. * An echinoderm’s water vascular system is ________________________________. * The water vascular system also helps an echinoderm _____.

  8. Characteristics of Echinoderms tube feet * Echinoderms have __________. * An echinoderm’s tube feet are used for _________________________________.

  9. Starfish * Starfish are also called ___________. * Starfish have __________ arms connected to a central body. * On the bottom of the arms are hundreds of ___________ that look like suction cups.

  10. Starfish * A starfish is able to _________ its arms. * A starfish uses its _____ feet to move and to open its food.

  11. Sea Urchins * Sea urchins have longer and sharper ________ that they use to protect themselves. * Some sea urchins have ________ spines.

  12. Sea Urchins * Sea urchins have a mouth hidden under its body. * A sea urchin uses its five teeth to eat ____________. * A sea urchin is not very active. Sometimes, it does move slowly using its __________. When not moving it uses its feet to stick to the ocean floor.

  13. Sea cucumbers Other Echinoderms Sand dollars Sea lily

  14. Arthropods An arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs. There are four main kinds of arthropods.

  15. Arthropods There are more than 1 million kinds of arthropods on Earth. There are three characteristics that all arthropods have.

  16. exoskeleton. All arthropods have an An ________ is a hard, outer covering.

  17. Some arthropods grow too big for their exoskeletons. molt. These arthropods will _______ is to leave an exoskeleton and grow a new one.

  18. Ocean Arthropods Arthropod click for chart crab Water Strider lobster barnacle spider shrimp scorpion Copepod tick mite

  19. Crustacean A crustacean is an arthropod that has a hard, exoskeleton, two pairs of antennae, and a mouth for crunching and grinding. Crustaceans are ... ____________

  20. Crustaceans Crustaceans can ________ certain parts of their body. Most crustaceans live in ______ and get oxygen from the water through _________. Gills are special respiratory organs that help some animals breathe and get oxygen from the water.

  21. Spiders, Scorpions Ticks, and Mites * All have __________ legs. • * Have a body divided into two parts: • ______________________________ • ________________________________

  22. Figure 7.27 Shore crab- crustacean

  23. Figure 7.28 Copepod- small crustacean Click for pictures of microsopic crustaceans viewed in lab

  24. Daphnia - the water flea Click here

  25. Figure 7.29a Barnacle - small crustacean

  26. Figure 7.30 amphipod - small crustacean

  27. Figure 7.31 Sea louse (isopod) - small crustacean

  28. Figure 7.35

  29. Figure 7.36

  30. Figure 7.37 top

  31. Sea Spider on an anemome

  32. A Review Arthropods Echinoderms Crustaceans Starfish Sea Urchins Spiders & Scorpions Ticks & Mites Sand dollars Centipedes & Millipedes Sea lilies Sea cucumbers Insects

  33. Arthropod Quiz Questions: • What are the three main characteristics of arthropods? • Where do small crustaceans live? • Name 2 small Crustaceans. • How do they protect themselves? • Explain what a crustacean is and how it eats. • Arthropod means joined appendages. How does this describe this group of animals? • Three out of every four animals on the planet are arthropods. Why are they so numerous and successful? • Is a crustacean an arthropod? Explain. • Decapods like the lobster have ten legs. Name two other features that they have. • Arthropods are very successful animals – 3 out of every 4 animals are arthropods. Their success is in adapting to all types of environments. This is due in part to their ____________________ and their __________________________________.

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