Structural Arrangement and Properties of Spicules in Glass Sponges

Figure 3

Localization of probes for the analysis of the elemental composition in spicules Asconema setubalense: (a) intact spicule surface, (b) in cross-section, (c) after etching with NaOH. Scale: (a, c) 1 μm, (b) 130 μm.

(a)

(b)

(c)