Relating to or describing the ambulacra on echinoderms like starfish and sea urchins.
From ambulacrum with the adjectival suffix '-al,' creating a descriptive term for structures related to these water-conducting grooves. A direct zoological modification.
When marine biologists talk about a starfish's 'ambulacral system,' they're describing one of nature's coolest hydraulic pumps—seawater pressure literally inflates and deflates tube feet to make the creature walk!
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