Source:http://linkedlifedata.com/resource/umls/id/C0504082
UWDA: Material physical anatomical entity in a gaseous, liquid, semisolid or solid state, with or without the admixture of cells and biological macromolecules; produced by anatomical structures or derived from inhaled and ingested substances that have been modified by anatomical structures as they pass through the body. Examples: saliva, semen, cerebrospinal fluid, inhaled air, urine, feces, blood, plasma, lymph.,FMA: Material anatomical entity in a gaseous, liquid, semisolid or solid state, with or without the admixture of cells and biological macromolecules; produced by anatomical structures or derived from inhaled and ingested substances that have been modified by anatomical structures. Examples: saliva, semen, cerebrospinal fluid, respiratory air, urine, feces, blood, plasma, lymph.