Abstract
IT is now well recognized that growth and moulting in the insect are initiated by a hormone produced in the neurosecretory cells of the brain. This brain factor activates the thoracic gland, which is then believed to secrete the definitive growth and moulting hormone1. But the possibility remains that there may be yet further links in the chain of endocrine organs, located in the abdomen.
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References
Wigglesworth, V. B., “The Physiology of Insect Metamorphosis” Mon. of Exp. Biol., No. 1 (Cambridge, 1954).
Wigglesworth, V. B., Quart. J. Micro. Sci., 77, 191 (1934).
Butenandt, A., and Karlson, P., Z. Naturforsch., 9 b, 389 (1954).
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WIGGLESWORTH, V. The Endocrine Chain in an Insect. Nature 175, 338 (1955). https://doi.org/10.1038/175338a0
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DOI: https://doi.org/10.1038/175338a0
