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SOIL employees outside the treatment plant. Port-au-Prince, Haiti, from "Human: The World Within"

Science & Nature

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Science & Nature

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Explore the incredible universe inside each and every one of us. An examination of diverse personal stories from around the world reveals how our lives, passions and goals are powered by the amazing systems that define our biology as a species.

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1:25

Functions of the Heart and Lungs

Our heart and lungs circulate oxygen throughout our blood vessels to keep cells alive.

1:42

How Pain is Processed in Our Nerves

Pain travels to our brain as neural impulses when something is wrong in our bodies.

An Introduction to the Brain and Neurons

1:09

An Introduction to the Brain and Neurons

The brain is mission control of the human body and the nervous system.

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Watch this show and many more anytime, anywhere on the free PBS App.

Watch this show and many more anytime, anywhere on the free PBS App.