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Proprioception - The Sixth Sense

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Engineering Lost Function Inside the Body

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The Human Body's Nervous System

1:22

The Human Body's Five Senses

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Our Sense of Smell

1:02

The Adaptive Quality of Our Senses

2:53

The Immune System

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The Digestive System

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The Gut Microbiome is the Hub of Our Immune System

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Blood Vessels and Circulatory Movement

2:08

The Science Behind the Pulse in Our Bodies

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Functions of the Heart and Lungs

1:25

Human: The World Within

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Through the lens of a boxer, a first responder, a cell tower climber and a man with a bionic limb, go deep into the universe of the most powerful machine on earth: the human brain and the vast nervous system it controls.

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Full Episodes

Human: The World Within

Sense

Explore the incredible world of human sensation and how it defines our reality.

Human: The World Within

Defend

Uncover how the human body defends itself in an increasingly dangerous global environment.

Human: The World Within

Fuel

Journey through the factory at the center of our bodies that turns food into energy.

Human: The World Within

Pulse

See the world beneath the human heartbeat that makes our craziest feats possible.

Human: The World Within

Birth

Learn the story of human reproduction from attraction to a baby’s first breath.