Relating to or capable of exhaling or breathing out; used in biology to describe structures that expel fluids or gases.
From Latin exhalare (ex- 'out' + halare 'to breathe'), combined with the suffix -ent indicating a quality or state. The term emerged in scientific literature during the 17th-18th centuries to describe biological structures.
Exhalent channels in clams and other filter-feeding animals are how they expel water after straining food—it's like a living water treatment system that's been perfected over millions of years!
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