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Figure 11


Fig. 11. High-resolution NanoSIMS image of a 2 µm-thick, freeze-substituted section of Galaxea fascicularis after 8 min incubation in 44Ca artificial seawater in the light. The 40Ca image (A) shows very high levels of 40Ca in cnidocytes and mucocytes in the oral ectoderm (OE) and oral gastrodermis (OG) compared with unspecialised ectodermal cells (E) and mesogloea (M). ETC, extrathecal coelenteron. The 44Ca/40Ca ratio image (B) indicates that 44Ca had reached a high relative concentration in the unspecialised oral ectodermal cells (E) and mesogloea but relatively little exchange had occurred in the mucocytes (Mu) or cnidocytes (Cn).





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