ring canal


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Related to ring canal: radial canal

ring canal

[′riŋ kə‚nal]
(invertebrate zoology)
In echinoderms, the circular tube of the water-vascular system that surrounds the esophagus.
References in periodicals archive ?
Then water will pass through stone canal, ring canal, and radial canal and finally reach tube feet and ampullae [18].
Justin will be unmissable on the Warwickshire Ring canal system this weekend in his BIG yellow The Family Adventure Store kayak.
The radial canal is adjacent to the ventral surface of the arm and extends from the ring canal to the tips of the arms.
Now, more than ten years on, Justin paddling 106 miles around the Warwickshire Ring canal system.
After the next bridge, turn left down a track which goes under two railway lines, eventually joining up with another canal track, The Cheshire Ring Canal walk.
At the same level in which the two parts of the axial sinus join, the top of the stone canal bends over and joins the ring canal that encircles the mouth [ILLUSTRATION FOR FIGURE 13 OMITTED].
The municipality consists of 26 cores and the Hrlemmermeer polder, which is surrounded by the ring canal, and is one of the larger municipalities in the Netherlands.
To the west of the ring canals, is the Jordaan, a lovely area to walk, with quiet canals, tiny streets and unusual shops.
In the egg chambers of fruit flies, that RNA also moves from nourishing cells called nurse cells to the maturing egg, traveling through cytoplasmic pathways called ring canals, says Columbia's Tulle Hazelrigg.