coelomate animals

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• Cambrian explosion — The Cambrian explosion or Cambrian radiation was the seemingly rapid appearance of most major groups of complex animals around Ma|530, as evidenced by the fossil record. [http://www.ucmp.berkeley.edu/cambrian/camb.html The Cambrian Period] ]… …   Wikipedia

• Appendiculata — is a zoological name introduced by E. Ray Lankester (preface to the English edition of C. Gegenbaur s Comparative Anatomy ), and employed by the same writer in the 9th edition of Encyclopædia Britannica (article Zoology ) to denote the eighth… …   Wikipedia

• echinoderms — n.; n. pl. [Gr. echinos, spiny; derma, skin] Phylum of marine coelomate animals with basic pentaradiate symmetry in the adult, with a calcareous endoskeleton and a water vascular system …   Dictionary of invertebrate zoology

• metanephridium — n.; pl. ia [Gr. meta, after; nephros, kidney] Paired osmoregulatory or excretory tubules in some phyla; tubules that open into the body cavity and are found in coelomate animals …   Dictionary of invertebrate zoology

• coe|lo|mate — «SEE luh mayt», adjective, noun. –adj. having a coelom: »The earthworm…is the traditional type with which students begin their study of coelomate animals (Betty I. Roots). –n. an animal having a coelom …   Useful english dictionary

• Coelom — Skin (ectoderm) …   Wikipedia

• animal — animalic /an euh mal ik/, animalian /an euh may lee euhn, mayl yeuhn/, adj. /an euh meuhl/, n. 1. any member of the kingdom Animalia, comprising multicellular organisms that have a well defined shape and usually limited growth, can move… …   Universalium

• Bryozoa — Temporal range: Upper Cambrian–Recent[1] …   Wikipedia

• circulation — circulable /serr kyeuh leuh beuhl/, adj. /serr kyeuh lay sheuhn/, n. 1. an act or instance of circulating, moving in a circle or circuit, or flowing. 2. the continuous movement of blood through the heart and blood vessels, which is maintained… …   Universalium

• skeleton — 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.… …   Universalium

• echinoderm — /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 …   Universalium