Figure 1From: Calcium sensors of ciliary outer arm dynein: functions and phylogenetic considerations for eukaryotic evolution Schematic drawings of various Ca 2+ -dependent changes in wave propagation of cilia and flagella and the direction of locomotion and water flow in several organisms and tissues. Red dots in Ciona sperm and Chlamydomonas flagella indicate acrosomes and mating structure (fertilization tubules), respectively. Black and gray arrows represent the direction of wave propagation and cell locomotion, respectively.Back to article page