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GACS lclab Biology- Chapter 27 - Echinoderms and Invertebrate Chordates- Vocabulary

GACS lclab Biology- Chapter 29- Echinoderms and Invertebrate Chordates- Vocabulary
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pedicellaria
pincerlike appendages
water vascular system
a hydraulic system that operates under water pressure
madreporite
a sievelike, disk shaped opening on the upper surface of the echinoderm's body
tube feet
hollow, thin- walled tubes that end in a suction cup
ampulla
round, muscular structures at the end of tube feet
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
a long, semirigid, rodlike structure located between the digestive system and dorsal hollow nerve cord
postanal tail
chordate structure used primarily for locomotion
dorsal tubular nerve cord
tube-shaped chordate nerve chord 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