…a minute opening in a surface, especially the skin or integument of an organism, through which gases, liquids, or microscopic particles may pass…
…a minute opening in a surface, especially the skin or integument of an organism, through which gases, liquids, or microscopic particles may pass…
…a minute opening in a surface, especially the skin or integument of an organism, through which gases, liquids, or microscopic particles may pass…
