ambulacra! system
1echinoderm — /i kuy neuh derrm , ek euh neuh /, n. any marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea …
2Blastoid — Taxobox name = Blastoids fossil range = Ordovician Permian image caption = Blastoid fossils ( thecae ) attached to matrix. regnum = Animalia phylum = Echinodermata subphylum = Blastozoa classis = Blastoidea classis authority = Say, 1825… …
3Echinoderm — Temporal range: Cambrian–recent …
4skeleton — skeletonless, adj. skeletonlike, adj. /skel i tn/, n. 1. Anat., Zool. the bones of a human or an animal considered as a whole, together forming the framework of the body. 2. any of various structures forming a rigid framework in an invertebrate.… …
5Brittle star — Temporal range: 488.2–0 Ma …
6tube foot — noun tentacular tubular process of most echinoderms (starfish and sea urchins and holothurians) having a sucker at the end and used for e.g. locomotion and respiration • Hypernyms: ↑foot, ↑invertebrate foot • Part Holonyms: ↑echinoderm * * * noun …
7Dendraster excentricus — Eccentric Sand Dollar or Western Sand Dollar Ganges Harbour, BC Scientific classification Kingdom: Ani …
