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ELL Biology Ch 11

Invertebrates

TermDefinition
vertebrate an animal with a backbone
invertebrate an animal without a backbone
organ system a group of organs and tissues that work together to perform a certain job
symmetry a body plan that forms mirror images along a line
sponge an invertebrate that lives in water and has many pores in its body
cnidarian an invertebrate with a hollow body and stinging cells
parasite an organism that lives on or inside another organism, usually causing it harm
host an organism that a parasite lives on or in
mollusk an invertebrate with a soft body that may or may not have a shell
echinoderm an invertebrate that has an inner skeleton and rays that extend from a central point
regeneration the ability to regrow lost body parts
arthropod an invertebrate with an exoskeleton and jointed appendages
exoskeleton a tough, stiff covering around the body of an organism
appendage a movable part that extends out from the body, such as arms, legs, wings, and claws
thorax the middle segment of an arthropod's body
abdomen the rear segment of an arthropod's body
metamorphosis the process of change and development that an insect goes through as it becomes an adult insect
asymmetry a body plan that forms no mirror images
radial symmetry a body plan that forms many mirror images
bilateral symmetry a body plan that forms only one mirror images.
molting when an organism sheds its exoskeleton, feathers, or skin
Created by: Jesse Wayland
 

 



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