Inflammatory response… arachidonic acid (1913) : a liquid unsaturated fatty acid C 20 H 32 O 2 that occurs in most animal fats, is a precursor of prostaglandins, and is considered essential in animal nutrition prostaglandins (1936): any of various oxygenated unsaturated cyclic fatty acids of animals that perform a variety of hormonelike actions (as in controlling blood pressure or smooth muscle contraction.
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