Learn about your immune system--how it functions to keep you healthy and disease free. In only 45 minutes, this video raises and answers a large number of questions about your health and how to maintain and enhance your physical well being. Mr. Carter describes the "Healthy Cell Concept" in detail. Learn why it is so important for your body to receive the proper nutrients, clean water, and the proper exercise. The inset video clip shows Mr. Carter demonstrating a Needak rebounder. He explains the theory and practice of how rebounding works. He also helps you understand why it is such an effective and powerful exercise program for people of all ages.