ring canal
anatomy
Quick Summary
A ring canal is a circular tube found in certain aquatic animals. In echinoderms, such as starfish, it's part of the water-vascular system, which helps them move and feed. This system includes a ring vessel that connects to radial canals, which then lead to tube feet. In jellyfish, the ring canal is located at the edge of their umbrella and connects the radial canals.12
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