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SH no backbone

key terms

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
Created by: brickmyxbox