Relating to or characterized by both fibrous tissue and serous membrane (the smooth, fluid-secreting lining around organs).
From fibro- + serous (Latin serum, watery fluid). This anatomical term describes tissues that combine properties of both fibrous and serous structures.
The membranes around your heart and lungs are fibroserous—they need to be tough enough to protect organs but slippery enough that everything can slide smoothly without friction as your organs move and breathe.
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