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Animal Life question: How do tube feet help echinoderms move? These tube feet have suction disks that enable the animals to crawl or attach themselves to objects. Think of a starfish clinging to the walls ... Do tube feet of a living organism move in unisom? How do some echinoderms use tube feet for movement?
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wiki.answers.com/Q/How_do_tube_feet_help_echinoderms_mo...
wiki.answers.com/Q/How_do_tube_feet_help_echinoderms_move
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How Do Sea Stars Move?; Each sea star had hundreds of tiny feet on the bottom of each ray. These are tube feet, or podia. These tiny feet can be filled with sea water. The vascular system of the sea star is also filled with sea water.
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www.mbgnet.net/salt/coral/animals/echinod.htm
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Echinodermata has approximately 7000 described living species and about 13,000 extinct species known from the fossil record. ... Most radially symmetric animals are sessile, however, echinoderms are able to move. The water vascular system originally functioned for collection and transport of food, but evolved to function...
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animaldiversity.ummz.umich.edu/site/accounts/informatio...
animaldiversity.ummz.umich.edu/site/accounts/information/Echinodermata.html
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These and many other organisms, living and extinct, make up the Echinodermata, the largest phylum to lack any freshwater or land representatives. ... Echinoderms have a system of internal water-filled canals, which in many echinoderms form suckered "tube feet", with which the animal may move or grip objects.
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www.ucmp.berkeley.edu/echinodermata/echinodermata.html
www.ucmp.berkeley.edu/echinodermata/echinodermata.html
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The canals lead to podia, or tube feet, which are sucker-like appendages that the echinoderm can use to move, grip the substrate, or manipulate objects. These tube feet are extended and retracted by hydraulic pressure in the water-vascular system. ... Source: Hyman, L. H. 1955. The Invertebrates. Volume IV: Echinodermata.
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www.ucmp.berkeley.edu/echinodermata/echinomm.html
www.ucmp.berkeley.edu/echinodermata/echinomm.html
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Summary phylogenetic hypothesis of the Echinodermata, based on David and Mooi (1997), Littlewood et al. (1997), and Sumrall and Sprinkle (1997). Note that the phylogenetic position of most fossil echinoderms is still uncertain, and a number of additional extinct taxa will be added to this tree ... Move Internet Links to Top...
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tolweb.org/tree?group=Echinodermata&contgroup=Deuterost...
tolweb.org/tree?group=Echinodermata&contgroup=Deuterostomia
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Containing group: Echinodermata ... Move Internet Links to Top ... other Echinodermata...
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tolweb.org/tree?group=Holothuroidea&contgroup=Echinoder...
tolweb.org/tree?group=Holothuroidea&contgroup=Echinodermata
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Echinoderms move, feed and breathe with a unique water-vascular system ending in what are called tube feet. Sea stars use their tube feet to slowly pry open clams, mussels or other prey. Some sea stars can even evert their stomach between the two shells of a bivalve and digest the soft parts inside.
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www.pbs.org/kcet/shapeoflife/animals/echinoderms.html
www.pbs.org/kcet/shapeoflife/animals/echinoderms.html
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Sea stars, sea urchins and most other members of the phylum Echinodermata move along the ocean bottom using structures known as tube feet. These tube feet, called ambulacrae in science-speak, are unique to this group of animals.
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