Source:http://linkedlifedata.com/resource/umls/id/C0440790
UWDA: Organ the unshared parts of which do not surround anatomical spaces; only its shared parts (subdivisions of hollow tree organs) contain anatomical spaces. Examples: lung, liver, thymus, ovary, muscle (organ), meninx, superficial fascia, skin.,FMA: Organ the unshared parts of which do not surround macroscopic anatomical spaces; only its shared parts (subdivisions of hollow tree organs) contain anatomical spaces. Examples: lung, liver, thymus, ovary, muscle (organ), meninx, superficial fascia, skin.