Radial canal

radial canal canal radiating from a center, such as in a starfish Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ... Full article ...

radial canals. Canals along the ambulacra radiating from the ring canal of echinoderms; also choanocyte-lined canals in syconoid sponges.

radial canal Part of the water vascular system, it extends into each arm of the starfish and ends in a small external tentacale at the tip of each arm.

Water passes through a stone canal to a ring canal and into the radial canals in each arm. The radial canals feed into lateral canals extending into tube feet, each of which has an ampulla.

See also: Crustacea, Scale, Dorsal, Lateral, Pharynx