Arthropods, Platyhelminthes, Molusc

Card Set Information

Author:
Siobhan
ID:
120779
Filename:
Arthropods, Platyhelminthes, Molusc
Updated:
2011-12-04 19:51:35
Tags:
Arthropods Platyhelminthes Molusc
Folders:

Description:
Arthropods, Platyhelminthes, Molusc
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user Siobhan on FreezingBlue Flashcards. What would you like to do?


  1. Characteristics
    of Flatworms (Platyhelminthes)

    • Marine, freshwater, moist
    • terrestrial
    • Some free-living, many parasitic
    • Bilaterally symmetrical, acoelomate
    • Incomplete gut
    • Sensory organs
    • No organ systems
    • Asexual and sexual reproduction
    • They are flat
  2. Platyhelminthes
    Reproduction

    • Monoecious (hermaphroditic)
    • Sexual
    • Penis Fencing
    • (yup, it’s really called that)
    • Asexual
    • Fission,
    • budding, regeneration
  3. Phylum
    Platyhelminthes:

    Parasites

    • Parasite of vertebrates
    • Adapted for parasitism
    • Organs
    • for attachment
    • Glands
    • produce secretion for attachment
    • Often have:
    • Protective
    • body covering
    • Complex
    • life cycle involving 2 or more hosts
    • Examples include
    • Schistosoma
    • (blood fluke), which has a snail intermediary
    • Tapeworms
    • in
    • beef or pork
  4. Annelida
    • The Segmented Worms
  5. Characteristics of Annelids
    • Ubiquitous (moist)
    • Includes
    • Oligocheates
    • (earthworms),
    • polychaetes
    • (marine
    • worms), leeches
    • Brain with ventral nerve cord
    • Complex sensory organs
    • Coelom functions as hydrostatic
    • skeleton
    • Can be both Monoecious (hermaphroditic) or dioecious (separate sexes)
  6. Annelid
    Anatomy

    • Segmented body
    • Complete digestive system (mouth
    • and anus)
    • Closed circulatory system
    • Respiration through diffusion or
    • gills
    • Excretion through nephridia (kidneys)
  7. Mollusca
    • “soft
    • bodied”
  8. Characteristics
    of
    Molluscs
    • Mantle and muscular foot
    • Ubiquitous
    • Complex digestive system
    • Radula
    • Nervous system with sensory organs
    • Sexual reproduction
    • Hemocoel - open circulatory system
    • with
    • heart, blood vessels, blood
    • Trochophore larvae
    • Sensory organs including complex
    • eyes
    • Mono- and dioecious

  9. The
    Mantle

    • Molusc
    • Gas exchange
    • Respiratory
    • organs/surfaces
    • Excreta location
    • Products
    • of digestion released here
    • Eggs/sperm
    • released here
    • Aquatic organisms
    • Water
    • pumped through by cilia
    • Sensory
    • organs
    • Cephalopods (squid, octopuses)
    • Mantle
    • is muscular
    • Used
    • in locomotion
    • Secretes shell (and makes pearls!)

  10. Gastropods:
    Snails and Slugs

    • Molusc
    • “stomach foot”
    • Largest, most diverse class of molluscs
    • Sessile or sedentary
    • Can be shell-bearing
    • Operculum for closing shell

  11. What’s
    that shell for?

    • Molusc
    • Protection
    • Predation
    • Water
    • loss
    • Environmental
    • fluctuations
    • Features of the shell:
    • Usually
    • dextral or
    • right-handed
    • Grows
    • with the animal
    • Sometimes
    • has pores for water/gas exchange
    • Why do the shells coil?
  12. Gastropod
    Diet

    • Molusc
    • All use the radula
    • Scrape algae off rocks
    • Break seaweed
    • abalone
    • Drill holes through bivalves
    • moon
    • snail
    • Cilia in gills collect particles
    • Limpets,
    • slipper snails

  13. Bivalves
    • Molusc
    • “Two-shelled”
    • Sedentary
    • Suspension feeders
    • No radula
    • Little cephalization
    • Mostly marine, some freshwater
    • Sensory organs
    • Siphons and/or muscular foot

  14. Bivalve
    Reproduction

    Molusc

    • Separate sexes
    • External fertilization (mostly)
    • 3 larval stages

  15. Ecological
    Importance of Bivalves

    • Invasives
    • Zebra
    • mussel
    • Filter water
    • Disease
    • Paralytic,
    • Amnesic, Neurotoxic Shellfish Poisoning (~30 deaths/yr)
    • Vibrio
    • (~100 deaths/yr)
    • Economic/Food
    • Aquaculture
    • in CT alone several $million/yr
    • Geoducks
  16. Cepholopods
    • Molusc
    • “head foot”
    • Squid, octopus, nautilus,
    • cuttlefish
    • All marine
    • Size varies greatly
    • Predaceous
    • Fish,
    • other molluscs,
    • crustaceans, worms
    • Highly mobile
    • Some venomous
    • Jaws with radula
    • Arms or tentacles with or without
    • suckers
    • Large brain (intelligent!)
    • Complex eyes

  17. Cephalopod
    Reproduction

    • Molusc
    • Dioecious
    • Male produces spermatophore
    • Often elaborate mating
    • “performances”

  18. Cephalopod
    Behavior

    • Complex brains and eyes
    • Tool-using octopus
    • Mating rituals
    • Ink production for defense
  19. Arthropoda
    • joint
    • footed”


  20. Characteristics
    of Arthropods

    • Jointed, often specialized
    • appendages
    • Ubiquitous
    • Coelomates
    • Exoskeleton of chitin
    • Freeliving and parasitic
    • Complex organ systems
    • Complex behavior
    • Open circulatory system
    • Metamorphosis

  21. Arthropod
    “Success”

    • Body permits movement and agility
    • Complex sensory abilities,
    • including compound eyes
    • Complex behaviors
    • Adaptation to a wide range of
    • habitats
    • Every feeding adaptation including
    • parasites

  22. Arthropod General
    Anatomy

    • Body divided into functional
    • regions
    • Head
    • Abdomen
    • Thorax
    • Appendages
    • Paired
    • and specialized

  23. Arachnids
    • Arthropods
    • Simple eyes
    • Sensory hairs
    • 8 pairs legs
    • Carnivorous
    • Includes:
    • Spiders
    • Scorpions
    • Ticks
    • and Mites

  24. Myriapods

    “many-footed”

    • Arthropods
    • Centipedes
    • Predators of earthworms, insects
    • 1 pair legs/segment
    • Millipedes
    • Herbivores
    • 2 pairs legs/segment

  25. Insects
    • Largest group of arthropods
    • 3 pairs of legs
    • Many fly: 2 pairs wings (usually)
    • Specialized mouthparts
    • Specialized appendages
    • Includes
    • Butterflies and moths
    • Bees, ants, wasps
    • Beetles
  26. Crustaceans
    • Arthropods
    • “shell bearing”
    • Lobsters, crabs, barnacles
    • Primarily aquatic
    • Free-living or parasitic
    • Have gills
    • Sensory antennae
    • Economic importance

What would you like to do?

Home > Flashcards > Print Preview