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water-vascular system

Line breaks: water-vascular sys¦tem

Definition of water-vascular system in English:

noun

Zoology
(In an echinoderm) a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.
Example sentences
  • These tube feet are extended and retracted by hydraulic pressure in the water-vascular system.
  • Like all echinoderms, echinoids are pentaradially symmetrical, have a water-vascular system, and have an internal skeleton made of calcitic ossicles (plates).
  • In starfish, only the left hydrocoel of the larva develops into the adult water-vascular system, while the right hydrocoel disappears.

Definition of water-vascular system in:

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