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Skin, Lungs, and GI Barriers to Toxicants
Barriers between the outer and inner body:
Area |
Thickness |
Weight |
Daily Exposure |
|||||
|---|---|---|---|---|---|---|---|---|
| Barrier | ft2 | m2 | in | um | lbs |
kg | lbs |
kg |
| Skin | 21 | 2 | 4 X 10 -3 | 100 | 28 - 38 |
12 - 16 | Var. |
Var. |
| Lungs | 2,150 | 200 | 4 X 10 -4 | 10-12 | 15 |
7 | 4-6 |
2-3 |
| GI Tract | 1,500 | 140 | 1 X 10 -5 | 0.2-0.4 | 1.9 - 2.1 |
0.8 - 0.9 | 50 |
24 |
(Adapted from Moeller, Dade W. Environmental Health, 1992, p. 4)
© 2005 Center for Environmental Health