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Biology Chapter 27 V

TermDefinition
Pedicellaria Small pincher that helps echinoderms catch food and remove foreign materials from the skin.
Water-Vascular System System of fluid-filled, closed tubes that allow echinoderms to control movement and get food.
Madreporite Strainer Like opening through which water enters the water-vascular system in most echinoderms
Tube Foot One of the muscular, small, fluid-filled tubes with suction-cup like ends that enable echinoderms to move and collect food.
Ampulla In echinoderms, the muscular sac that contracts to force water into the tube foot, allowing it to extend.
Chordate Animal of the phylum chordata having a dorsal tubular nerve cord, a notochord, pharyngeal pouches, and a postanal tail at some point in its development.
Invertebrate Chordate Chordate without a backbone.
Notochord Flexible, rodlike structure extending the length of the chordate body, enabling the body to bend and make side-to-side movements.
Postanal Tail Chordate structure used primarily for locomotion.
Dorsal Tubular Nerve Cord Tube-shaped chordate nerve cord located above the digestive organs.
Pharyngeal Pouch In chordate embryos, one of the paired structures connecting the muscular tube lining the mouth cavity and the esophagus.
Created by: Alayna Long
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