part of part of located_in organ viscus AAO:0010386 An internal organ of the body; especially: one (as the heart, liver, or intestine) located in the great cavity of the trunk proper.[AAO] An organ that is located within the body cavity (or in its extension, in the scrotum); it consists of organ parts that are embryologically derived from endoderm, splanchnic mesoderm or intermediate mesoderm; together with other organs, the viscus constitutes the respiratory, gastrointestinal, urinary, reproductive and immune systems, or is the central organ of the cardiovascular system. Examples: heart, lung, esophagus, kidney, ovary, spleen. BTO:0001491 EHDAA:512 EMAPA:16245 FMA:7085 MA:0000019 MESH:D014781 Organsystem@ge RETIRED_EHDAA2:0002201 UBERON:0002075 UMLS:C0042779 XAO:0003034 general anatomical term in FMA. Note that we place the MA class here temporarily, although properly systems should be distinguished from organs. splanchnic tissue uberon viscera visceral organ visceral organ system visceral tissue trunk coelemic cavity lumen trunk region element