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Biology ch9
animals without backbones
Term | Definition |
---|---|
Vertebrate | animal without a backbone |
Endoskeleton | skleleton isdide the body |
invertrbrate | animal a without backbone |
exoskeleton | skeleton on the outside of the body |
pores | tiny openings |
porriferan | invertebrate animal with pores |
spicule | small hard needlelike structure of a sponge |
cidarian | invertebrate animal witht stingimg 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 mollusks organs |
radula | rough tonguelike organ of a snail |
echinoderm | spiny skinned animal |
water vascular system | system of tubes used to transpot 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 | material that makes up the exos |