Figure 1

Lung development in Polypterus senegalus.

Specimens at (a) 8 days post fertilization (dpf), (c) 9 dpf and (e) 13 dpf; and sections at (b) 8 dpf, (d) 9 dpf and (f–i) 13 dpf stained with hematoxylin and eosin. Red arrows indicate the right lung bud. Scale bars, 100 μm. fg, foregut; lb, lung bud; m, mesenchyme.