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Exploring the Diverse Animal Kingdom: Mollusks, Arthropods, and Echinoderms

Dive into the fascinating world of invertebrates! This overview covers key animal groups, focusing on mollusks like gastropods, bivalves, and cephalopods, as well as arthropods, including insects, arachnids, and crustaceans. Learn about the unique characteristics of arthropods, such as jointed appendages and exoskeletons, and their survival strategies. Discover the intriguing life cycles of insects, from metamorphosis to molting. We'll also explore echinoderms, highlighting their unique body structure and regenerative capabilities. Join us in understanding these incredible creatures!

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Exploring the Diverse Animal Kingdom: Mollusks, Arthropods, and Echinoderms

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  1. Animal Kingdom – Part II

  2. Mollusks • Gastropod • Pod = feet • Gastro = stomach

  3. Mollusks • Bivalve • Bi = 2

  4. Mollusks • Cephalopod • Cephalo = head

  5. Mollusks

  6. Arthropod • What does arthropod mean? • Jointed Foot

  7. Arthropods • List 4 characteristics of arthropods • Jointed appendages • Exoskeleton (external skeleton) • Segmented body • Open circulatory system

  8. Arthropod • Name some types of appendages arthropods have • Claws/pincers • Antennae • Legs • Wings • How does the exoskeleton help with survival? • Keeps moisture inside the animal • Protects the animal

  9. Arthropod • Name the major classes of arthropods • Arachnids (spiders, scorpions, ticks, and mites) • Diplopods (millipedes) • Chilopods (centipedes) • Insects • Crustaceans ( crabs, lobsters, crayfish and shrimp)

  10. Arthropods • What is molting? • Shedding the exoskeleton when it is too small.

  11. Arthropods • How do arthropods develop into adults? • Metamorphosis • Complete metamorphosis stages – egg, larva, pupa, adult • Incomplete metamorphosis stages- egg, nymph, adult

  12. Arthropods

  13. Insects • Did you know… • Insects make up about ½ of all scientifically described organisms (including animals) • Approximately 12 insect species are discovered each day, and experts think that 10 million to 100 million species have yet to be discovered.

  14. Insects • Insects are the strongest jumpers in the world for their size and weight. A flea can jump 200 times it’s body length- equivalent to a man leaping 5 city blocks. • Some 450 species of plants prey on insects and other small creatures • An ant can pick up a stone 50 times its own weight

  15. Insects • Queen termites may live as long as 50 years, adult mayflies may live only a few hours • A caterpillar had more than 4,000 distinct muscles, people have 800 • An army ant colony on the march may contain as many as 100,000 members and will kill any animal in it’s path • A fairy fly, the smallest insect known to exist, would fit inside a period at the end of a sentence.

  16. Insects

  17. Insects • FEED – with a variety of mouthparts • Herbivores • Carnivores • Scavengers • Decomposers • Parasites

  18. Insects • Helpful • Honey • Silk • Plant pollination • Decomposition • Kill harmful insects

  19. Insects • Defenses • Sting • Release chemicals • Camouflage • Mimic (mimicry)

  20. Echinoderms • Organization of body • 5 part radially symmetric • Internal skeleton • Water vascular system ( fluid filled tubes that carry food & oxygen to cells and wastes away from cell)

  21. Echinoderms • Can regenerate • Feeding • Many clamp onto bivalve mollusks and open them using suction cups on their arms

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