Table 4.

Alveolar epithelial and capillary endothelial surface densities, areas and ratio of capillary endothelial to epithelial surface areas

	Control (n = 7)	Hypoxic (n = 6)
Epithelial surface density (cm2 cm−3)	711.9 ± 73.9	686.9 ± 55.7
Total epithelial area (cm2 LL−1)	1436 ± 169	2302 ± 119*
Endothelial surface density (cm2 cm−3)	806.8 ± 79.6	959.4 ± 61.6
Total endothelial area (cm2 LL−1)	1642 ± 186	3261 ± 230*
Endothelial/epithelial ratio	1.14 ± 0.02	1.41 ± 0.07*

Values are means (± S.E.M.). Epithelial surface density, alveolar epithelial area per unit volume of left lung. Total epithelial area, alveolar epithelial surface area per left lung. Endothelial surface density, capillary endothelial surface area per unit volume of left lung. Total endothelial area, capillary endothelial surface area per left lung.

^*Significant difference from controls (P < 0.005, t test).