holothurian

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holothurian

echinoderm

Also known as: Holothuria

Learn about this topic in these articles:

circulatory system

In circulatory system: Echinodermata
…most highly developed in the holothurians (sea cucumbers), in which it consists of an anterior hemal ring and radial hemal sinuses. The most prominent features are the dorsal and ventral sinuses, which accompany the intestine and supply it through numerous smaller channels. The dorsal sinus is contractile, and fluid is…
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sea cucumber

In sea cucumber
…sea cucumbers of the genus Holothuria are especially abundant on coral reefs. Most species of Holothuria are deposit feeders similar to earthworms: they ingest sediment to extract the organic constituents.
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