the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > member of > parts of > ambulacrum > ambulacral tube (3)
Zoology. A stalk or stalklike projection in an animal; spec. (a) the second joint of an insect's antenna; (b) an eyestalk of a crustacean; (c) the…
one of the numerous ambulacral tubes of an echinoderm.