Fig. 5
Presentation of data from findings in lungs, lymph node and nose related to the inhalation of the TiO2 particles. Numbers reflect the group mean of histopathologic investigation calculated by the sum of the individual severity grades of the animals of the respective group divided by the total number of animals of the respective group (n = 6). The different colors reflect additionally the severity grade of the diagnoses ranging from green (severity grade 0) to red (severity grade 4). Abbreviations: accum.: accumulation, aggr.: aggregation, BALT: bronchus-associated lymphoid tissue, extrac. mat.: extracellular material, hyperpl.: hyperplasia