Abstract
WE have recently been examining the testes of Acheta domesticus Linn. in the electron microscope (Siemens Elmiskop 1), using osmium-fixed ultra-thin sections of about 250 A. In the course of this work we have made a number of observations on tracheæ which supplement earlier findings1–5. Fig. 1 shows a longitudinal section of a trachea which appears to consist of a folded ‘endocuticular’ layer (A), and an ‘exocuticular’ layer (B) which surrounds both the trachea and the accompanying cell (C). Fig. 2 shows a section through the ‘endocuticular’ folds. The ‘endocuticular’ layer itself is about 100 A. thick. The folds are ring-like or possibly helical, and are separated from each other by a few thousands of angstroms. The ‘exocuticular’ layer is also about 100 A. thick.
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DEUTSCH, K., CLAYTON, BP. Tracheæ of Acheta domesticus Linn.. Nature 178, 1354–1355 (1956). https://doi.org/10.1038/1781354a0
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DOI: https://doi.org/10.1038/1781354a0
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