Figure 3.

Computed sperm velocity as a function of channel width. Swimming speed is predicted to increase dramatically as the channel walls become closer. Non-dimensionalised terms are velocity/wave speed of the flagellum and channel width/amplitude of flagellar beat. Redrawn from [81].

Humphries et al. BMC Evolutionary Biology 2008 8:319   doi:10.1186/1471-2148-8-319
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