Term | Definition |
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 |