High magnification of the finger-like projections observed in a transverse section of a late stage emu spermatid. The average width, length and distance between projections are indicated by (i), (ii), and (iii). Nucleus (N); Manchette microtubules (M). Bar = 0.1 μm.
du Plessis and Soley BMC Evolutionary Biology 2013 13:104 doi:10.1186/1471-2148-13-104