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  • Title: The brain of the horseshoe crab (Limulus polyphemus). I. Neuroglia.
    Author: Fahrenbach WH.
    Journal: Tissue Cell; 1976; 8(3):395-410. PubMed ID: 982418.
    Abstract:
    The brain of the horseshoe crab, Limulus polyphemus, harbors three populations of neuroglial cells, whose distribution and cellular details are best appreciated by a combination of silver impregnation, scanning, and transmission electron microscopy. Stellate astrocytes envelop neurons as satellite cells, permeate the neuropile, and secrete a framework of sustentacular trabeculae throughout the brain. Velate astrocytes are restricted to Kenyon cells, i.e. small association neurons, of which they harbor up to 150 per neuroglial cell. Vascular neuroglia is composed of glycogen and mitochondria-laden, interlocked cells that form an open meshwork in the hemocoelic spaces of the brain. Aside from supportive functions of neuroglia, the vascular neuroglial cells in particular seem to subserve the role of a metabolic reserve cell for the central nervous system.
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