Table 1.
Comparison of morphometric parameters and innate immune cells.
| Parameter | Human alveolus | Mouse alveolus (references) |
|---|---|---|
| Radius of alveolus | 116.5 μm | 26.2 ± 7.2 μm (29, 34–41) |
| Number of type 1 AEC | 48 | 4 (42) |
| Number of type 2 AEC | 84 | 4 ± 2.4 (42–44) |
| Number of PoK | 24 | 7 (45) |
| Type 1 AEC radius | 27 μm | 22 μm |
| Type 2 AEC edge length | 9.34 μm | 8.12 μm (42) |
| Number of alveoli per lung | 4.8 × 108 | 3.3 ± 1.3 × 106 (34, 41) |
| Number of AM | 2.1 × 109 | 2.4 ± 0.7 × 106 (42, 46) |
| Radius of AM | 10.6 μm | 9.5 μm (47) |
The parameters of the human alveolus were taken from the literature search by Pollmächer et al. (26) and those of the mouse alveolus have been retrieved from the indicated references.