To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S2. T. foetus motility in TALP. T. foetus swam via coordinated wave motion of the three anterior flagella. Recorded at 20 FPS, replayed at 10 FPS. (Scale bar: 20 μm.) Microgrooves and fluid flows provide preferential passageways for sperm over pathogen Tritrichomonas foetus Chih-kuan Tung, Lian Hu, Alyssa G. Fiore, Florencia Ardon, Dillon G. Hickman, Robert O. Gilbert, Susan S. Suarez, and Mingming Wu PNAS. 2015. 112:5431-5436 DOI: 10.1073/pnas.1500541112 Download Original Video Browse All Videos »