Ambulacral is a term typically used in the context of anatomical parts of the phylum Echinodermata or class Asteroidea and Edrioasteroidea.
[1][2] Echinoderms can have ambulacral parts that include ossicles, plates, spines, and suckers.
This ambulacral groove extends from the mouth to the end of each ray or arm.
Each groove of each arm in turn has four rows of hollow tube feet that can be extended or withdrawn.
This article about anatomy of the phylum Echinodermata is a stub.