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30 Cards in this Set

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sessile
immobile, does not control own movement
spongocoel
central cavity in porifera, water flows into
osculum
top hole in porifera, water flows out of
choanocytes
collar cells in spongocoel, trap food w/ flagella
mesohyl
separates cell layers in porifera
amoebocytes
traveling cells in porifera, bring nutrients to whole body, secrete hard skeleton
gastrovascular cavity
in cnidaria, ctenophora, and platyhelminthes; for digestion, 'incomplete' digestive tract
polyps
attach to a medium and tentacles extend upward; coral and hydras, cnideria
medusas
flattened, mouth and tentacles downward, drifts for movement; cnideria
cnidocytes
on tentacles of cnideria
nematocytes
stinging cells in cnidocytes of cnideria
pharynx
mouth and anus of platyhelminthes
flame cells
regulate gas exchange and excrete nitrogenous waste in platyhelminthes
blood fluke
parasite in platyhelminthes, alternates between mature for in human and asexual larvae form in snail hosts
tapeworms
parasite in platyhelminthes, suckers and hook on head attach to digestive tract of vertebrate host, long series of sex organs line posterior end, absord food particles
lophophore
characterizes lophophore phyla, U shaped or circular fold in body that is ciliated to bring food particles to mouth
visceral mass
internal organs in mollusca
mantle and cavity
secretes shell, covers visceral mass, water-filled in mollusca
radula
toungue like appendages for feeding in mollusca
trochophore larvae
ciliated larval stage in mollusca and annelida
gastropodia
class of snails and slugs in mollusca, "stomach foot," torsion
bivalvia
class of clams, oysters, mussels, scallops in mollusca; two hinged shells
cephalopodia
class of squids and octopuses in mollusca, "head foot,"
polychaete
class in annelida, setae and parapodia, marine
leeches
class in annelida
exoskeleton, cuticle
hard covering on arthropoda, protein and chitin, protection, attached to muscles, water proof, molted
trilobites
extinct grouping of arthropoda
chelicerae
grouping of arthropoda; horseshoe crabs, scorpions, spiders; clawlike feeding appendages, no sensory antennae, simple eyes
uniramians
grouping in arthropoda; insects, centi/milli pedes; jawlike mandibles for feeding, 1 pair sensory antennae, compound and simple eyes, uniramous (unbranched) feet
crustaceans
grouping in arthropoda; crabs, lobsters, shrimps, barnacles; 2 pairs antennae, compound and simple eyes, biramous (branched) feet