Fig. 2From: Flagellar beating forces of human spermatozoa with different motility behaviorsA sequence of frames extracted from a movie of a sperm cell being captured and released by FluidFM probe. When cantilever is far away from the sperm cell no pressure is applied (a), the sperm cell is captured by a negative pressure, which is then reduced for force measurement of the motile sperm cell (b), positive pressure is applied for sperm cell release (c). Scale bar 10 μmBack to article page