Are you right- or left-handed? Do you remember your first day of school? What are you thinking right now? The answers to these questions go right to the “brains of the operation,” the incredible nervous system of the human body. This part of The Human Body series explores the brain, spinal cord, nerves and the trillions of neurons, or nerve cells, that make our bodies uniquely human. Experts in neuroscience help us understand why the human brain is a marvel of structure and function. Viewers learn about left brain and right brain activities and the purpose and function of the cerebellum, cerebrum, cranial nerves and other parts of the brain. The program also examines the interaction of the spinal cord and nerve endings, as well as fascinating concepts like involuntary and voluntary brain activity and reflex and feedback functions. Viewers explore the five senses: our eyes, which transform shades of light into the phenomenon of sight; our ears, which convert variations in air pressure into hearing; our nerve endings, which translate contact to touch; and our tongues and noses which give us taste and smell. The sixth sense – balance – is also explained. The Human Body –The Nervous System offers fascinating insight into how our brain sets us apart from all other vertebrates. It gives us the ability to speak, reason, remember, and engage in complex thought, as well as the capacity to feel compassion, sadness, anger, joy and love.