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Anatomical observations after instillation with SWCNTs. Dissected lungs from a rat exposed to SWCNTs at 1 and 90 d post-instillation (A). The lungs were dissected at each time point post-instillation from groups of rats exposed to the vehicle control or a high dose of CNT-1 or CNT-2. Micrographs of lung tissue from rats exposed to CNT-1 or CNT-2 at a high dose at 1, 3, 7, 30, and 90 d post-instillation (B).
