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Invertebrates
Question | Answer |
---|---|
Cnidarians | Invertebrates that have stinging cells and take food into a central body cavity |
mollusks | have thin layer of tissue called a mantle that covers their internal organs and an organ called a foot |
arthropods | invertebrates that have hard outer covering |
exoskeleton | is shed and replaces as the animal grows |
echinoderm | is an invertebrate that has an internal skeleton and system of fluid-filled tubes |
endoskeleton | have radial symmetry |
chordates | have three characteristics |
notochord | is a flexible rod that supports a chordate's back |
vertebrates | has a hole in it from a tunnel that bundle of nerve tissue |
ectotherm | body temperature changes with temperature changes in it's environment |
endotherm | is an animal that controls the internal heart |