tube feet
Starfish walking organs
Tube feet are small, flexible appendages that echinoderms—starfish, sea urchins, sea cucumbers—use for movement, feeding, and gripping surfaces.
Each tube foot operates hydraulically, extending and retracting through water pressure in the animal's internal canal system.
Hundreds of tube feet working together allow a starfish to pry open a clam or crawl slowly across rocks.
- starfishFive-armed marine invertebrate
- podiaPlural speaking platforms
- sea urchinSpiny marine echinoderm
- sand dollarFlat burrowing echinoderm
- ampullaeSmall rounded vessels
ambulacral groove · echinoderms · radial symmetry · adhesion · suction · locomotion · slow movement · ossicles · appendages · sea star · spines · hydraulic pressure · ocean floor · marine biology · brittle star · feeding · sticky · tentacle
tube feetlegs
Locomotion appendages below torso
fins · wings · pseudopods · tentacles · setae
tube feetjet propulsion
Motion via expelled mass
peristalsis · undulation · swimming · flying · crawling
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