Figure 3
From: Ultrastructure of setae of a planktonic diatom, Chaetoceros coarctatus
Detailed observation of intercalary setae with SEM images (b-h, j, l) and schematic illustrations (a, i, k, m, n). The appearance of the root (b), middle (c, g), and apex (d), the fractured cross section of the middle (e, f), the poroid arrays on the outer and inner surfaces, and the cross-sectional view of the poroid array (h, j, l).
