Learn all about the human eyes and ears. What are the parts of the eyes and ears and the functions of each part? What is the role of the brain in processing sights and sounds? What is an optical illusion? What is the Doppler Effect? The answers to these questions and many more are covered with detailed graphics, diagrams and exciting video, as well as on-screen, multiple-choice reviews at the end of each segment that reinforce important concepts and make learning fun.