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Ch. 27 Vocabulary

TermDefinition
ampulla in echinoderms, the muscular sac that contracts to force water into the tube foot, allowing it to extend
madreporite strainerike opening through which water enters the water-vascular system in most echinoderms
pedicellaria small pincher that helps echinoderms catch food and remove foreign materials from the skin
tube foot one of the muscular, small, fluid-filled tubes with suction-cuplike ends that enable echinoderms to move and collect food
water-vascular system system of fluid-filled, closed tubes that allow echinoderms to control movement and get food
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.
dorsal tubular nerve cord tube-shaped chordate nerve cord located above the digestive organs
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
pharyngeal pouches in chordate embryos, one of the paired structures connecting the muscular tube lining the mouth cavity and the esophogus
postanal tail chordate structure used primarily for locomotion
Created by: hannahworrell
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