Biology Lecture ch 32 vocab

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  1. lophotrochozoans
    • have lophophore (a feeding structure)
    • have trochophore (a free-living larva)
  2. lophophore
    • a circular ring of ciliated/hallow tentacles around mouth
    • for food collection and gas exchange
  3. trochophore
    • the larval form of lophotrochozoans
    • moves by beating its cilia
    • cilia also helps move food for ingestion
  4. Ecdysozoans
    • have cuticle
    • they molt
    • contain Hox genes
  5. cuticle
    • an external covering that protects and supports the organism
    • rid of by molting
  6. molting
    the shedding of the cuticle to be replaced by a new, larger one
  7. exoskeleton
    • a type of cuticle
    • contains proteins and chitin
    • an external skeleton
  8. chitin
    a waterproof polysaccharide that reinforces cuticles to form exoskeletons
  9. arthropod
    • "jointed foot"
    • a clade
    • started the formations of appendages
    • legs used for walking, swimming, gas exchange, food capture/manipulation, copulation, and sense perception
  10. arrow worms
    • an exception
    • have 3 part body plan
    • predators
    • hermaphrodites
  11. flatworms
    • lack specialized organs for gas exchange
    • one opening for mouth/anus
    • has blind gut
    • hermaphroditic
    • some are parasitic
  12. rotifers
    • tiny organisms with specialized internal organs
    • has separate openings for mouth and anus
    • contains a complete gut
  13. Ribbon worms
    • nemerteans
    • contains rhynchocoel
    • ciliated
  14. Phoronids
    • small sessile worms that live in muddy or sandy sediments or attached to rocky substrates
    • marine animals
    • live in chitinous tube
    • cilia helps with feeding
  15. brachiopods
    • solitary marine animals
    • have rigid shells divided in two and connected by a ligament
    • resemble bivalves
    • live attached to substrate or embedded in sediment
    • uses cilia for feeding
  16. annelids
    • segmented
    • contains nerve cord
    • soft outer layer used for gas exchange
    • terrestrial
  17. mollusks
    • most derived group
    • have foot, visceral mass, and mantel
    • they have gills, heart, intestine/stomach, separate mouth/anus, and digestive gland
    • has open circulatory system
Card Set
Biology Lecture ch 32 vocab
ch 32 "Protostome Animals"
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