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21 terms

CHAPTER 13 ANIMALS~ GLENCOE LIFE SCEINCE

STUDY
PLAY
mantle
thin layer of tissue that civers the body organs of mollusks
visceral mass
main body of mollusks
gills
organs that exchange O2 and CO2
radula
tonge-like organ with rows of teeth
mantle cavity
space between the soft body and the mantle
setae
bristle-like structures that are used to hold on to the soil
anterior
refers to the front end
posterior
refers to the back end
crop
sac used for storage
gizzard
a structure that grinds-up the soil and orgnic matter
vermicompost
worm excrement
aortic arches
heart-like structures in a worm
parapodia
fleshy outgrowths on the segments of free-swimming polychaetes
appendages
parts of an animla that stick out from the main body
exoskeleton
hard outer covering that supports and protects the internal body
molting
the shedding and repacement of the exoskeleton
spiracles
openings on abdomen and thorax where air enters and gasses leave
metamorphosis
a series of changes in body form as an organism grows
cephalothorax
the head and ches region in spiders
book lungs
where O2 and CO2 exchanged in spiders
swimmeretes
five pairs of appendages on abdomen in crustaceans