The nuclear size and percentage of nonciliated and ciliated bronchiolar epithelial cells at 30 days of gestation and 4 and 17 weeks of post-natal age in rabbits
| Nonciliated bronchiolar cells | Ciliated cells | |||||
| 30 days | 4 weeks | 17 weeks | 30 days | 4 weeks | 17 weeks | |
| Dn μm | 8.1 | 6.7 | 6.2 | 9.0 | 7.0 | 7.2 |
| NL n per mm% | 86 | 78 | 61 | 14 | 22 | 39 |
| NA n per mm2 % | 86 | 77 | 61 | 14 | 23 | 39 |
| NV n per mm3 % | 90 | 78 | 67 | 10 | 22 | 33 |
| Δ3D→2D % | -4 | -1 | -6# | +4 | +1 | +6# |
Dn: mean calliper diameter of epithelial cell nuclei; nL: number of nuclear profiles per length of airway; nA: number of nuclear profiles per area of epithelium; nV: number of nuclei per volume of epithelium; Δ3D→2D %: the percentage of change from size-weighted estimates of nL and nA as compared with the unbiased estimate of nV [106]. #: significant difference between two-dimensional and three-dimensional estimates.