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chp4 lesson 3&4

TermDefinition
cnidarian they are invertebrates that have stinging cells and take food into a central body cavity
what are some examples of cnidarian's jellyfish & coral
mollusk soft, unsegmented bodies that are often protected by a hard shell.
arthropod have hard outer coverings, segmented bodies, and pairs of jointed appendages
echinoderms has internal skeleton and a system of fund filled tubes
endoskeleton internal skeleton
what are the main invertebrate groups? sponges,cnidarian , mollusk, arthropods, roundworms,echinoderms, segmented worms, and flatworms
Mantle a thin layer of tissue in the mollusk
what are 3 major groups of mollusk? Gastropod(snail), Bivalve (clam), and a Cephalopod ( squid)
exoskeleton outer skeleton
chordate has 3 characteristics : notochord, a nerve chord, and pouches in the throat area
notochord is a flexible rod that supports a chordates back
vertebrate stacks of many small bones
ectotherm an animal that produces little internal body heat
endotherm is an animal that controls the internal heat it produces and regulates at its own temperature
Created by: Arianna17