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ch 27
starfish
| Term | Definition |
|---|---|
| pedicellariae | small pincers that aid in catching food and in removing foreign materials from the skin |
| water-vascular system | a system of fluid-filled closed tubes that work together to enable echinoderms to move and get food |
| madreporite | a strainerlike opening to the water-vascular system |
| tube feet | are small muscular fluid-filled tubes that end in suction-cuplike structures and are used in movement food collection and respiration |
| ampulla | the opposite end of the tube foot is a muscular sac |
| chordates | are animals belonging to the phylum chordata that have four distinctive features |
| invertebrate chordates | which belong to two of the subphyla of chordares |
| notochord | is a flexible rodelike structure that extends the length of the body |
| postanal tail | is a structure used primarily for locomotion and is located behind the anus. |
| dorsal tubular nerve cord | located above the digestive organs and is a tube shape |