Health Assessment Document for Diesel Emissions - NSCEP | US ...

TABLE C-1. LUNG MODEL FOR RATS AT TOTAL LUNG CAPACITY
Generation Number of Accumulative
Number Airways Length (em) . Diameter (em) Volumeb (em)
1 1 2.680 0.340 0 .. 243
2 2 0.715 0.290 0,338
3 3 0.400 0.263 0.403
4 5 0.176 0.203 0.431
5 8 0.208 0.163 0.466
6 14 0.117 0.134 0.486
7 23 0.114 0.123 0.520
8 38 0.130 0.112 0.569
9 65 0.099 0.095 0.615
10 109 0.091 0.087 0.674
11 184 0.096 0.078 0.758
12 309 0.073 0.070 0.845
13 521 0.075 0.058 0.948
14 877 0.060 0.049 1.047
15 1,477 0.055 0.036 1.414
16a 2,487 0.035 0.020 1.185
17 4,974 0.029 0.017 1.254
18 9,948 0.025. 0.016 1.375
19 19,896 0.022 0.015 1.595
21 39,792 0.020 0.014 2.003
22 79,584 0.019 0.014 2.607
25 318,336 0.017 0.014 7.554
24 636,672 0.017 0.014 13.784
"Terminal bronchioles.
blncluding the attached alveoli volume (number of alveoli = 3 x 10 7 , alveolar diameter = 0.0086 em);
211/98 C-15 DRAFT --DO NOT CITE OR QUOTE