Figure 423 from Chapter 16 (Cytoplasmic matrix and cytoskeleton) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Longitudinal section of the manchette of a rodent spermatid. The microtubules end in a dense subplasmalemmal matrix seen at the top of the figure. A PDF copy of the accompanying chapter is available on the ASCB’s BioEDUCATE website.