tube feet


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tube feet

the locomotory organs of ECHINODERMS that are protruded from the body by, and are retracted by, fluid pressure from the water-vascular system.
References in periodicals archive ?
Morphological length and spacing of the tube feet in crinoids (Echinodermata) and their role in suspension-feeding.
Ullrich-Luter instead proposed that opsins in the little cavities at the bases of the tube feet would be shaded enough to detect light direction.
These animals were not sorted by tube feet color as significant mortality occurred before sorting.
The vascular system runs through each arm, carrying seawater to the tube feet and causing them to extend and retract as they are filled and emptied.
Finally, we examined body form and posture of crawling bat stars to better understand the use of tube feet and the water vascular system during locomotion.
hexactis and examined the arm that had been attacked, noting movement of tube feet along the affected arm and looking for radial nerve damage.
Tube feet also help some sea stars burrow into the soft seabed.
This may reflect the early role for the tube feet in benthic attachment after the adhesive disc is resorbed as the CNS differentiates post-settlement.
Most of the nerve fibers appeared to be either isolated fibers or groups of few fibers (different from the fiber bundles that innervated the tube feet described above).
The rudiment in a competent larva consists of five quintets of protuberances corresponding to the future tube feet and terminal tentacles of the juvenile (Fig.