A swimming sea urchin sperm cell (Lytechinus pictus) imaged using high-speed video microscopy to capture the fast (50 Hz) beat cycle of the flagellum and quantitative image analysis to track the cell head trajectory (blue) and the flagellar motion (red).
Biflagellated green alga (Chlamydomonas reinhardtii, ~10 microns) swimming with a “breaststroke” motion by beating its flagella 50 times per second, captured with high-speed video microscopy at 500 frames per second and shown in the cell’s reference frame.
The fluid flow field around a single swimming cell, breaststroking biflagellate Chlamydomonas reinhardtii (~10 microns) measured by particle tracking velocimetry with high-speed video microscopy at 500 frames per second and shown in the cell’s reference frame.
Hydrodynamic disturbances caused by swimming algal cells (Chlamydomonas reinhardtii, green trajectories) stir the surrounding fluid enhancing the transport of small particles (red trajectories) and dissolved molecules.
Micron-sized bacterium (Vibrio alginolyticus) executing a 90 degree turn in a fraction of a second, which is enabled by a buckling instability in the flagellar hook and captured at 420 frames per second.
The kinematics of a micron-sized bacterium (Vibrio alginolyticus) executing a 90 degree turn in a fraction of a second, which tracked using high-speed video microscopy at 1000 frames per second.
