Learn about our eyes and ears, part of the sensory system: the components of eyes and ears, and the functions of each part; how we see colour; the role of the brain in processing sights and sounds; the role of eyelids, lashes and brows; optical illusions; persistence of vision; vibrations and soundwaves; the inner ear and balance; and the Doppler effect, We also learn how to protect our hearing. Detailed graphics, diagrams, and video, plus multiple-choice reviews at the end of each segment reinforce important concepts.