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What (who) is tube foot - definition
MULTIPURPOSE ORGANS OF ECHINODERMS
Tube foot
![The shingle urchin (''[[Colobocentrotus atratus]]'') has among the most powerful podia of all echinoderms.](https://commons.wikimedia.org/wiki/Special:FilePath/Podia de Colobocentrotus atratus.JPG?width=200 "The shingle urchin (''[[Colobocentrotus atratus]]'') has among the most powerful podia of all echinoderms.")
![Collector urchins (''[[Tripneustes gratilla]]'') have elongated podia.](https://commons.wikimedia.org/wiki/Special:FilePath/T. gratilla podia.jpg?width=200 "Collector urchins (''[[Tripneustes gratilla]]'') have elongated podia.")
.jpg?width=200 "Close-up on the same specimen.")
![The nail starfish (''[[Mithrodia clavigera]]'') has particularly strong podia.](https://commons.wikimedia.org/wiki/Special:FilePath/Mithrodia clavigera bras.jpg?width=200 "The nail starfish (''[[Mithrodia clavigera]]'') has particularly strong podia.")
![Oral face of a sunflower sea star, ''[[Pycnopodia helianthoides]]''.](https://commons.wikimedia.org/wiki/Special:FilePath/Pycnopodia helianthoides on glass.jpg?width=200 "Oral face of a sunflower sea star, ''[[Pycnopodia helianthoides]]''.")
![P. helianthoides]]''.](https://commons.wikimedia.org/wiki/Special:FilePath/Pycnopodiahelianthoides-tubefeet.jpg?width=200 "P. helianthoides]]''.")
![Podia of a sea cucumber (''[[Holothuria forskali]]'')](https://commons.wikimedia.org/wiki/Special:FilePath/Holothuria forskali Rab2011 l 4213.JPG?width=200 "Podia of a sea cucumber (''[[Holothuria forskali]]'')")
tube foot
¦ noun Zoology (in an echinoderm) each of a large number of small flexible hollow appendages protruding through the ambulacra, used either for locomotion or for collecting food.
Tube feet
Tube feet (technically podia) are small active tubular projections on the oral face of an echinoderm, whether the arms of a starfish, or the undersides of sea urchins, sand dollars and sea cucumbers; they are more discreet though present on brittle stars, and have only a feeding function in feather stars. They are part of the water vascular system.
Tube (container)
SOFT, SQUEEZABLE CONTAINER WHICH CAN BE USED FOR THICK LIQUIDS SUCH AS ADHESIVE, CAULKING, OINTMENT, AND TOOTHPASTE
Toothpaste tube; Tube (packaging); Collapsible tube; Squeeze tube
A tube, squeeze tube, or collapsible tube is a collapsible package which can be used for viscous liquids such as toothpaste, artist's paint, adhesive, caulk, & ointments. Basically, a tube is a cylindrical, hollow piece with a round or oval profile, made of plastic, paperboard, aluminum, or other metal.
Wikipedia
Tube feet
Tube feet (technically podia) are small active tubular projections on the oral face of an echinoderm, whether the arms of a starfish, or the undersides of sea urchins, sand dollars and sea cucumbers; they are more discreet though present on brittle stars, and have only a feeding function in feather stars. They are part of the water vascular system.
