Abstract
RECENT experiments have demonstrated rapid exchanges of inorganic ions and molecules between the haemolymph and the tissues of the central nervous system in insect species1–3. These exchanges occur through the peripheral cellular and fibrous nerve sheath, which in most species is bathed directly by the surrounding haemolymph. In certain regions, however, as in the cockroach, the surface of the abdominal nerve cord may be overlaid by patches of fat-body. Electron microscopic investigation has shown that in the cockroach the fat-body cells exhibit a very close relation with the underlying neural lamella4. In view of the relative permeability of the neural lamella it was suggested4 that the metabolic processes of the fat-body cells might be intimately linked with those of the underlying perineurium, which is thought to be involved in the mobilization of nutrient substances by the central nervous system5.
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MADDRELL, S., TREHERNE, J. A Neural Fat-body Sheath in a Phytophagous Insect (Carausius morosus). Nature 211, 215–216 (1966). https://doi.org/10.1038/211215a0
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DOI: https://doi.org/10.1038/211215a0
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