Figure 10

Glial cells. A, B. Ensheathing glial cells surrounding a neuropil in the brain of the terrestrial hermit crab Coenobita clypeatus. [Glutamine-like immunoreactivity.] C, D. Nuchal nerve in the opheliid polychaete Armandia polyophthalma. C. Entire nerve with groups of neurites separated by glial cell processes. Arrowhead points to soma of glial cell. [TEM micrograph.] D. Enlargement of boxed area from C. Glial cells attached to extracellular matrix (arrow). Arrowheads point to bundles of intermediate filaments. [TEM micrograph.] E, F. Optic nerve of Scolopendra sp. in cross section. E. Axon bundle with each axon separated from its neighbours by a glial cell process (arrowheads). [TEM micrograph.] F. Glial cell ensheathing axons with thin enrolled processes. Arrowhead points to junction of cell processes from both sides. [TEM micrograph.] Abbreviations: ax = axon; coe = coelom; ecm = extracellular matrix; gc = glial cell; n = nucleus; ne = neurite; np = neuropil; pt = peritoneum. A, B: From [314], creative common license of BMC; Originals: C, D: G. Purschke; E, F: C.H.G. Müller.