Abstract
IT is well known that in insects during the process of moulting or ecdysis there is a thin plasma or moulting fluid. "When the epidermal cells separate from the old cuticle and begin to secrete the new, the space between the two cuticles is occupied by a thin plasma. In the later stages of moulting this space is filled by an abundant fluid, the moulting or ecdysial fluid, first clearly demonstrated by Newport. There can be little doubt that much of this fluid, which extends also throughout the tracheal system, arises by exudation from the epidermal cells; indeed, this has sometimes been its sole source. But the epidermis of the majority of insects contains numerous glands which become active only at the time of moulting and certainly contribute to the secretion of the fluid."1
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References
Wigglesworth, "Principles of Insect Physiology" 25 (1939).
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COLLINGE, W. Moulting Fluid of Woodlice. Nature 155, 179 (1945). https://doi.org/10.1038/155179b0
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DOI: https://doi.org/10.1038/155179b0
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