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The Chemistry of Life
Image: iStockphoto.com/selimaksan

The Chemistry of Life

What are you made of? Would you be surprised to find out you're mostly water?

Along with a lot of H2O, the human body also contains carbon, calcium, nitrogen, and phosphorus. Plus there are lots of trace elements, too. Learn more about the chemistry of the human body.

LiveScience
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The Star In You

The Star In You

Has anyone ever said you have stars in your eyes? They're right. No matter how old you are, most of the atoms in your body came from a star billions of years ago. Those that didn't, are even older! More...

Article
NOVA/PBS
Bacteria Talk

Bacteria Talk

You may think of bacteria as dirty, smelly, and generally gross. But bacteria can be helpful and healthful. In fact, they even "talk" to each other. More...

Profile
NOVA/PBS
Epigenetics

Epigenetics

Our body chemistry can be influenced and altered by our environment and diet. These outside factors can even cause differences in identical twins. More...

Video
PBS
How Cells Communicate During the Fight or Flight Response

How Cells Communicate During the Fight or Flight Response

When you sense danger or threat, you body releases a chemical messenger into your bloodstream. Take an in-depth look at the "flight or fight" response. More...

Article
University of Utah
How Do Pain Relievers Work?

How Do Pain Relievers Work?

Where does it hurt? Pain relievers are chemicals designed to work with your body chemistry to make the pain go away. But how does a pill know where the pain is? More...

Article
KidsHealth
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How the Body Uses O2

How the Body Uses O2

We depend on oxygen to live. Our blood, lungs, and brain can't function without it. Discover how the body uses oxygen and its importance to mountain climbers. More...

Article
NOVA/PBS
Metabolism

Metabolism

How does your body convert that burrito (or cookie) into energy? Explore the series of chemical reactions known as metabolism. More...

Article
TeensHealth
Phosphorus: Biological Information

Phosphorus: Biological Information

Phosphorus is the foundation for the double helix in DNA. Life as we know it depends of this element. Find out how much is in your body! More...

Interactive
WebElements.com
The Science of Gigantism

The Science of Gigantism

When the pituitary gland produces excess hormones, it can to gigantism. Take a closer look at this condition and the challenges it can produce in daily life. More...

Video
National Geographic
Will Drinking Carbonated Beverages Weaken My Bones?

Will Drinking Carbonated Beverages Weaken My Bones?

Has anyone ever told you that soda will rot your bones and teeth? Endocrinologist Robert Heaney of Creighton University explains how carbonated drinks affect calcium in your body. More...

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