radial canal

radial canal

[′rād·ē·əl kə′nal]
(invertebrate zoology)
One of the numerous canals that radiate from the spongocoel in certain Porifera.
Any of the canals extending from the coelenteron to the circular canal in the margin of the umbrella in jellyfishes.
A canal radiating from the circumoral canal along each ambulacral area in many echinoderms.
References in periodicals archive ?
The major components of the system are the circumoral ring canal, the radial canals extending from the ring canal down each arm, and the tube feet with their associated ampullae that are connected to the radial canal by the lateral canals.
In each radius, the ring canal gives off three branches - a radial canal that descends and runs out the arm, and, well to either side of it, canals that connect to upper and lower oral tube feet that lie horizontally between the jaws, within the mouth frame.

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