Structural Arrangement and Properties of Spicules in Glass Sponges

Figure 1

The morphology of a long ray of a pentactine spicule of Monorhaphis chuni. The cross-section shows the central cylinder with a canal surrounded with concentric layers. Scale (a) 100 μm, (b) 5 μm, and (c) 100 nm.

(a)

(b)

(c)