Figure 4
Velocity heat-map of the particles with no coating for the different time points where the particle velocity was analysed. The heat-map orientation matches the physical orientation of the trachea in the tissue bath, with the larynx to the left and lung to the right. Stationary particles are at the axis origin, slowly moving particles are close to the origin, and faster moving particles are further away. The angular position represents the particle direction of motion. Red and brown indicates more particles than yellow or blue.
