Assertion: mollusk's organ | /r/CapableOf | test the air
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Source sentences:
text: It can serve as a space to exchange carbon dioxide for oxygen from that air or water (respiration, in either case), a chamber through which to pump water and filter out food particles, a sampling area for sensory organs to test the air or water, a threshold through which to dump waste products, or a safe place to keep eggs while they mature.