How do star fish excrete their waste?



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    Sea stars (a more appropriate appellation than “starfish”, since they are not fish!) excrete nitrogenous waste through their tube feet and the tiny papullae that cover their external bodies. There are no excretory organs, and instead cells within the sea star’s bodies engulf waste particles and eventually move out through the tiny openings. Some waste is also voided through the pyloric glands.

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