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The Amazing Human Body
Freya Christie, Professional Tennis Player
Freya's bones in her racket arm have become thicker to cope with her intense workouts.
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54:40
See how experience teaches the brain and body to work together and develop new skills.
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54:40
Discover the miraculous ways the human body works to stay alive and healthy.
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54:40
Learn how humans grow from a single cell to beings of more than 37 trillion cells.