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  • National Geographic: The Brain

    The brain constitutes only about 2 percent of the human body, yet it is responsible for all of the body's functions. Learn about the parts of the human brain, as well as its unique defenses, like the blood brain barrier.

  • National Geographic: The Heart

    The human heart beats up to 3 billion times over an average lifespan. Learn about the anatomy of the heart and how this muscular organ provides life-giving oxygen throughout the body.

  • Science with Sophie: Taste Buds

    Sophie explains the purpose of taste buds and how they've helped humans survive. She also briefly mentions how the nose and the taste buds work together to influence the flavor of food.

  • Brain Divided: Blind Date

    A nerdy man goes on a blind date to a restaurant. The place is great, and the girl is beautiful. If only the two sides of his brain could work together for once.

  • Bill Nye, the Science Guy: The Eyeball

    Bill Nye explains some parts of the eye and explains how the eye works with the brain. Your eye captures the light and processes it, and your brain makes sense of your perceptions.