Figure 346 from Chapter 14 (Sperm Flagellum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Top panel: A cross section of sperm tail of the cecidomyid fly, Diplolaboncus tumorificus shows mitochondria scattered among doublets of microtubules. Lower panel, sperm tail organization in a related species of fly shows about 100 doublets a spiral or row-like arrangement. Figure from Baccetti and Dallai, J. Ultrastr. Res. 55: 50-69, 1976. A PDF copy of the accompanying chapter is available on the ASCB’s BioEDUCATE website.
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