Water vascular system
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The water vascular system or hydrovascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The syst
Madreporite of Asterias
Echinoderm
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An echinoderm is any animal of the phylum Echinodermata, which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While
Water vascular system
…The water vascular system or hydrovascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous…
Echinoderm collage 2
A brittle star, Ophionereis reticulata
A sea cucumber, Stichopus chloronotus, from Malaysia
Starfish of varied colours