anatomical cluster multi cell part structure A structure consisting of multiple cell components but which is not itself a cell and does not have (complete) cells as a part. AAO:0011000 CARO:0001000 FBbt:00007060 FMA:83115 UBERON:0005162 cell part cluster multi-cell-component structure multi-cell-part structure uberon we go with the FMA classification rather than the CARO one. FMA def: 'Anatomical cluster which has as direct parts cell parts from two or more cells.'