radial canal

noun

Definition of radial canal

1 : one of the numerous minute canals lined with choanocytes which radiate from the paragastric cavity in some sponges and end just below the surface of the sponge

2 : one of the canals extending through the substance of the umbrella from the gastric cavity to the marginal circular canal in jellyfishes

3 : a tube extending outward along each ambulacral area from the circumoral canal in most echinoderms

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radial cleavage

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