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exam
words
31
Science
12th Grade
05/08/2006

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Term
crustaceans
Definition
arthropods that have segmented bodys lobster crabs shrimp barnacle
Term
cephalothorax
Definition
head and thorax fused together
Term
carapace
Definition
the shell that protects the cephalathorax
Term
maxilipeds
Definition
short appendenges near the mouth used for feeding
Term
swimmerettes
Definition
abdominal appendeges adapted for swimming
Term
ectotherm
Definition
uses environmental heat and behaivor to rgulate it body temperature
Term
endotherm
Definition
uses internal heat to regulate its body temp
Term
molt
Definition
the hard outer shell of crustaceans it is discarded as the animal grows
Term
cirri
Definition
the modified feathery legs of a barnacle, used to catch food
Term
echinoderms
Definition
radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
Term
molluscs
Definition
typically having a soft unsegmented body, a mantle, and a protective calcareous shell
Term
mantle
Definition
a thin layer of tissue between the body and the shell, secretes the shell
Term
siphon
Definition
tubes that act as a snorkel to breath, inhale and exhale water
Term
gastropods
Definition
having a single, usually coiled shell or no shell at all, a ventral muscular foot for locomotion, and eyes and feelers located on a distinct head.
Term
limpets
Definition
cling to rock graze on algae
Term
cone shells
Definition
deadly poisen
Term
proboscis
Definition
an extention used to capture or collect food near the mouth
Term
chitons
Definition
armor of 8 plates
Term
bivalves
Definition
mussel oyster, scallop clam
Term
suspension feeder
Definition
an aquatic animal such as a clam or balleen whale that shirts algae from the water
Term
cephalopods
Definition
most advanced group of mollusks spuid octopuses
Term
ink sac
Definition
gland that some cepapods use to spray dark fluid to discourage predators
Term
tube feet
Definition
structures on underside of the arms of echinoderms which help them attach to surfaces
Term
ampula
Definition
bulb like sacs on upperend of each tube foot that contract legs longer
Term
arthropods
Definition
jointed-foot invertebrates: arachnids; crustaceans; insects; millipedes; centipedes
Term
tunicate
Definition
chordate marine animals having a cylindrical or globular body enclosed in a tough outer covering and including the sea squirts and salps.
Term
otholith
Definition
One of many minute calcareous particles found in the inner ear of vertebrates and in the statocysts of many invertebrates
Term
horseshoe crab
Definition
having a domed carapace that is shaped like a horseshoe and a stiff pointed tail
Term
pedicellariae
Definition
A peculiar forcepslike organ which occurs in large numbers upon starfishes and echini
Term
nudibranches
Definition
colored as a warning that they are poisonous
Term
sea hair
Definition
naked marine gastropod having a soft body with reduced internal shell and two pairs of ear-like tentacles
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