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Human: The World Within

The Digestive System

An introduction to the amazing functions of the human body's digestive system. Our continued survival as individuals and as a species requires energy. And we get that by extracting nutrients from the food we eat. Our digestive system has the job of refining everything we eat into raw power.

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Full Episodes
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Episode
52:30
Human: The World Within

React

See how the technology of the brain and nervous system shape our experience of the world.
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Episode
52:33
Human: The World Within

Sense

Explore the incredible world of human sensation and how it defines our reality.
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Episode
52:33
Human: The World Within

Defend

Uncover how the human body defends itself in an increasingly dangerous global environment.
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Episode
52:33
Human: The World Within

Fuel

Journey through the factory at the center of our bodies that turns food into energy.
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Episode
52:30
Human: The World Within

Pulse

See the world beneath the human heartbeat that makes our craziest feats possible.
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Episode
52:30
Human: The World Within

Birth

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