How does an echinoderm use its tube feet?

Echinoderms use it's tube feet for feeding, movement and respiration.

Explanation:

Echinoderms are group of phylum of Marine animals that are triploblastic and they include star fishes, sea cucumbers, sea urchins e.t.c.

Echinoderms have tube feet's. The tube feets are outer projections on the oral parts of the body. They are part of the vascular system and are arranged in grooves along the arms. They operate through hydraulic pressure and are use for feeding ( passing food orally) , respiration and loccomotion.

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

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