Some members of this phylum use podicellaria for locomotion and feed on organisms using a body part called the lantern of Aristotle.
Some members of this phylum use podicellaria for locomotion and feed on organisms using a body part called the lantern of Aristotle. This phylum of organisms is the first to have a true endoskeleton made from mesodermal cells. The oldest members of this phylum are crinoids, and other groups of them include ophiuroids and holothuroids. These organisms move and breathe by pumping material through a sieve plate into a stone canal, which provides locomotion to their tube feet. Typically, these organisms make use of a water vascular system and exhibit pentaradial symmetry. For 10 points, name this invertebrate phylum that includes sea urchins and starfish.
Some members of this phylum use podicellaria for locomotion and feed on organisms using a body part called the lantern of Aristotle.
echinoderms [Accept echinodermata]