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Nutin
Ch.9 Vocab
| Term | Definition |
|---|---|
| vertebrate | animal with a backbone |
| endoskeleton | skeleton inside the body |
| invertebrate | animal without a backbone |
| exoskeleton | skeleton on the outside of the body |
| pores | tiny openings |
| poriferan | invertebrate animal with pores |
| spicule | small,hard,needlelike structure of a sponge |
| cnidarian | invertebrrate animal with stinging cells and a hollow central cavity |
| polyp | cuplike form of a cnidarian |
| medusa | umbrella-like form of a cnidarian |
| platyhelminth | type of worm with a flattened body |
| parasite | organism that gets its food by living on or in the body of another organism |
| nematode | type of worm with a round body |
| annelid | type of worm with a segmented body |
| setae | tiny,hairlike bristles |
| closed circulatory system | organ system in which blood moves through vessels |
| mollusk | soft-bodied organism |
| mantle | thin membrane that covers a mollusk's organs |
| radula | rough,thonguelike organ of a snail |
| echinoderm | spiny-skinned animal |
| woter-vascular system | system of tubes used to transport water |
| tube feet | small structures of echinoderms used for movement and feeding |
| regeneration | ability to regrow lost parts |
| arthropod | animal with an exoskeleton and jointed legs |
| chitin | hard material that makes up the exoskeleton of arthropods |
| open circulatory system | circulatory system in which blood does not flow constantly through tubes |
| molting | process by which an animal sheds its outer covering |
| antenna | structure used for touch, taste, and smell |
| thorax | middle section of an insect's body |
| abdomen | third section of an insect's body |
| spiracle | opening to an air tube of a grasshopper |
| tympanum | hearing organ in a grasshopper |
| metamorphosis | series of developmental changes of an organism |
| larva | immature stage of many animals that usally looks different from the adult form |
| pupa | resting stage during complete metamorphosis |
| cocoon | protective covering around the pupa |
| nymph | young insect that looks like the adult |