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What are the narrow, elongated holes called? What function do these openings serve? its about sand...

What are the narrow, elongated holes called? What function do these openings serve?

its about sand dollar. hopefully it helps you
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Answer #1

There are 5 elongated holes arranged in a flower petal-like pattern, besides having mouth and anus. These holes are called gonophores, they have a varied function like they are there for respiration using petaloid tube feet. The pores also are involved in movement seawater and gas in and out which can help them in movement.

Hope it heps

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