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Biol 11 Lesson 1 April 5  - Arthropoda (1)
 

Biol 11 Lesson 1 April 5 - Arthropoda (1)

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    Biol 11 Lesson 1 April 5  - Arthropoda (1) Biol 11 Lesson 1 April 5 - Arthropoda (1) Presentation Transcript

    • Phylum Arthropoda: Arthropods Chapter 28: Arthropods pp. 606-631
      • Biology fun facts of the day:
      No two human beings have the same fingerprint; likewise, no two spider webs are the same.
      • Mosquitoes dislike citronella because it irritates their feet. You're more likely to be a target for mosquitoes if you consume bananas.
      Biology fun facts of the day:
      • Each year, insects eat 1/3 of the Earth's food crop.
      Biology fun facts of the day:
      • Australian termites have been known to build mounds twenty feet high and at least 100 feet wide.
      Biology fun facts of the day:
    • Introduction to Arthropods
      • Phylum Arthropoda - Latin arthro = “joint”, pod = “foot”
      • Bilateral symmetry
      • 3 cell layers (ectoderm, endoderm, mesoderm)
      • Have a coelom (reduced to the excretory and reproductive systems)
      • Key features:
      • Jointed appendages
      • Exoskeleton (made of chitin)
      • Segmented body (head, thorax, abdomen segments)
        • Probably evolved from segmented wormlike animals, similar to
        • modern annelids
    • Subphyla of Arthropods
        • Subphylum Trilobita: ex: trilobites
        • Oldest subphylum, all extinct now, but ubiquitous for many era.
        • Subphylum Chelicerata: ex: spiders, scorpions, ticks, mites, horseshoe crabs, etc.
          • Special mouthparts called chelicerae
        • Subphylum Crustacea: ex: crabs, lobsters, shrimp, etc.
        • Over 35,000 species!
        • Subphylum Uniramia: ex: millipedes, centipedes, and all insects
        • Huge group!
    • Form and Function of Arthropods
          • Arthropods vary a lot , but share some key features:
          • Jointed appendages
          • Exoskeleton
          • Segmented body
          • Brain located in the dorsal part of the head
          • Ventral nerve cord
          • Open circulatory system powered by a single heart
      *3 most important features* Grasshopper diagram
    • Form and Function of Arthropods
          • Digestive system:
          • Complete digestive tract (mouth  anus)
          • Many arthropods have specialized feeding parts
          • Every mode of feeding is seen
          • Examples:
          • Predators
          • Filter feeders
          • Parasites
          • Scavengers (detritivores)
          • Herbivores
          • etc.
          • Respiratory system:
          • 1) Gills – feathery structures (ex: crustaceans)
            • 2) Book gills/lungs – pagelike sheets of respiratory tissue
            • (ex: chelicerates)
            • 3) Tracheae – network of tubes that carry air (ex: uniramians)
          • Circulatory system:
          • Open circulatory system
          • Well-developed heart pumps blood through arteries, which branch into smaller vessels which lead to open spaces called sinuses
          • Excretory system:
          • Malpighian tubules (terrestrial arthropods)
          • Gills or green gland (aquatic arthropods)
          • Nervous system:
          • All arthropods have a brain that consists of a pair of ganglia
          • Ventral nerve cord
          • Ganglia along nerve cord
          • Many sense organs may
          • be present
          • Examples:
          • Eyes (compound or simple)
          • Antennae
          • Statocysts
          • Tympanic membrane
          • Chemoreceptors
          • Musculoskeletal system:
          • Movement only at joints
          • Muscles attached to inside of exoskeleton
          • Arthropods moult when they grow because exoskeleton won’t expand
      Freshly moulted crab Crab moult Cicada moult
    • Babies look like miniature adults . They increase in size as they grow older, but do not change overall form . Ex: grasshopper Eggs hatch into larvae (immature stages that do not look like adults). As larvae grow, they change shape dramatically. Ex: butterfly, bees, wasps
    • Ecology of Arthropods
      • Arthropods are the bottom of the food chain (ex: copepods)
      • Pollination – co-evolution with flowering plants
      • Symbiotic relationships (ex: cleaner shrimp and fish)
      • Food source for humans (especially crustaceans)
      • Useful chemicals
      • Honey, silk
      • Disease carriers (ex: mosquitoes, mites, ticks)
      • Crop destruction, pesticides
    • Video – “Arthropods”
    • Homework for next class:
      • Complete Phylum Arthropoda worksheet
      • Read over class notes and check out the class blog: http://msoonscience.blogspot.com/
    • Works Cited
      • Images taken from the following sources:
      • http://www.news.cornell.edu/releases/Oct04/insects.openhouse.ssl.html
      • http://www.cracked.com/funny-1934-spiders/
      • http://www.police.oakland.edu/fingerprints
      • http://www.kiwicare.co.nz/index.cfm/1,182,0,0,html/No-Mosquitoes-Citronella-Candle
      • http://www.dealspice.com/
      • http://www.gardenguides.com/789-corn-rootworm-information.html
      • http://www.ent.uga.edu/veg/colecrops.htm
      • http://www.the-discount-travel-guide.com/Kakadu-National-Park.html
      • http://www.bio.miami.edu/dana/160/160S10_13print.html
      • http://www.thepoisonforest.com/?tag=trilobite
      • http://www.treehugger.com/files/2010/01/deadly-scorpion-venom-used-create-new-safer-pesticide.php
      • http://stirwordfest.wordpress.com/book-lung/
      • http://www.brisbaneinsects.com/brisbane_insects/GrasshopperHead.htm
    • Works Cited
      • http://www.wildsingapore.com/wildfacts/crustacea/moulting.htm
      • http://squirrelbasket.wordpress.com/2010/07/04/words-fledge-fletch-moult-mews-%E2%80%93-and-mould/
      • http://rohlenscience.pbworks.com/w/page/7859192/Insects-Notes
      • http://www.buyinsectcollection.com/identifying_insects
      • http://www.bbcgoodfood.com/content/knowhow/glossary/honey/
      • http://www.livingprairie.ca/livinglandscape/hikes/index.html
      • http://www.superstock.com/stock-photos-images/1532R-3016
      • http://www.raisethehammer.org/article/640
      • http://www.chacha.com/topic/arthropods
      • http://www.nooor.com/search/Invertebrate/&p=13