Sea Star Body Functions

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Echinoderm (Water Vascular System)

Sea Star

Central Disk

center, top, circle, where arms radiate,

Sieve Plate

center of central disk, poops and drinks from there

Anus

Center of sieve plate - eliminates

Mouth

bottom of sea star - where food enters

Tube Feet

on bottom, middle of arms - suction to grab food

Stomach

internal, below central disks - digestive organ

Rectal Caeca

brown feathery structure, comes out to arms, waste storage before expulsion

Hepatic Caeca

in arms, produces enzymes for food breakdown by stomach

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