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SH no backbone
key terms
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 | Invertibrate animal with pores. |
Spicule | Small, hard, needlelike structure of a sponge. |
Cnidarian | Invertebrate 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. |
Parisite | Organism that gets its food by living on or in the body of another organism. |
Nematode | Type of worm with a segmented body. |
Annelid | Type of worm with a segmented body. |
Setea | Tiny, hairlike bristles. |
Closed circulatory system | Organ system in wich blood moves through vessels. |
Mollusk | Soft-bodied organism. |
Mantle | Thin membrane that covers a mollusk's organs. |
Radula | Rough, tonguelike organ of a snail. |
Echinoderm | Spiny-skinned animal. |
Wtaer-vascular system | System |