1 / 12

Unit 8 Chapter 28 Arthropods

Unit 8 Chapter 28 Arthropods. What is an Arthropod?. Bilaterally symmetrical, segmented coelomates Segmented body, exoskeleton & jointed appendages Appendages = body outgrowths. What is an Arthropod?. Arthropods must molt (shed exoskeleton periodically)

joylyn
Download Presentation

Unit 8 Chapter 28 Arthropods

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unit 8Chapter 28Arthropods

  2. What is an Arthropod? • Bilaterally symmetrical, segmented coelomates • Segmented body, exoskeleton & jointed appendages • Appendages = body outgrowths

  3. What is an Arthropod? • Arthropods must molt (shed exoskeleton periodically) • Arthropods have variety of respiration types: gills, tracheal tubes & book lungs • Arthropods have complex digestive and excretory systems: • Mandibles (jaws) are used to classify arthropods

  4. What is an Arthropod? • Arthropods have well-developed senses: • Pheromones = chemical odor signals given off by animals (detected by others) • Compound eyes = visual structure with many lenses • Simple eye = visual structure with only one lens for detecting light

  5. What is an Arthropod? • Arthropods reproduce sexually: • Some are hermaphroditic, most have internal fertilization • A few have parthenogenesis = new individuals develop from unfertilized eggs Ex: social insects, such as bees, ants & wasps

  6. Diversity of Arthropods • Arachnids • Includes spiders, scorpions, ticks & mites (chiggers) • Two body segments & six pairs of jointed appendages, including 8 legs, 2 chelicerae (fangs) and 2 pedipalps (sensors)

  7. Diversity of Arthropods • Crustceans • Includes crabs, lobsters, shrimp, crayfish, pill bugs & barnacles • Two body segments & 2 pair of antennae, 5 pair of legs, and numerous “jaw feet”

  8. Diversity of Arthropods • Millipedes & Centipedes • Many body segments and paired legs • Millipedes are herbivorous, while centipedes are carnivores • Horseshoe Crabs • These “living fossils” have remained unchanged for 200 million years

  9. Diversity of Arthropods • Insects…Most successful class in terms of diversity • Includes beetles, butterflies, ants & bees, flies & mosquitoes, and many others • Three body segments, 3 pair of legs, one pair of antennae, and wings

  10. Metamorphosis • Series of changes in body shape and form during life history • Incomplete M: 3 stages including nymph (smaller, immature version of adult)

  11. CompleteM: 4 stages including larva (wormlike creature which eats and grows) and pupa (enclosed structure that changes into adult form)

More Related