CHAPTER 13 ANIMALS~ GLENCOE LIFE SCEINCE

21 terms by Hepburn

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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

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