Fig. 7From: Comparative carcinogenicity study of a thick, straight-type and a thin, tangled-type multi-walled carbon nanotube administered by intra-tracheal instillation in the ratSEM image of MWCNT-B (arrow) engulfed by an alveolar macrophage. At higher magnification (right), MWCNT-B manifests as an irregularly shaped mass (arrow) in the macrophage cytoplasmBack to article page