Figure 3.

The absorption of SWCNTs through intestinal columnar epithelial cells [10]. (A) SWCNTs (arrows) found in the intestinal mucous membrane. (B) Magnification of the cell indicated by the left arrow in (A). Ve, transportion vehicles; Vi, villus of the columnar cells. (C) Magnification of the Ve, which has membrane with double lipid layers (arrow).

Zhang et al. Nanoscale Research Letters 2011 6:555   doi:10.1186/1556-276X-6-555
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