+A pore is a minute [opening](/wiki/opening) or channel, often visible on the [surface](/wiki/surface) of a material, organism, or cell. These tiny passages facilitate the passage or exchange of substances, such as fluids, gases, or secretions.
+## See also
+- [Respiration](/wiki/respiration)
+- [Diffusion](/wiki/diffusion)
+- [Membrane](/wiki/membrane)
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