Body Systems

The Big Bad Wolf told Little Red Riding Hood that his enormous ears made him hear better, but is that really true? Find out if size really does matter when it comes to ears and hearing.

By Jennifer Sellers

Flatulence is funny, but there's actually some pretty interesting stuff going on in your body to cause it. After reading these 10 facts, you may never look at airplane travel the same way.

By Maria Trimarchi

Learn to recognize the symptoms of a concussion and what causes them. Worried that your child has a concussion? Learn the symptoms of a concussion and how to treat it.

By Dr. Rob Danoff

Avoid bloating this bathing suit season by taking these bloating tips to heart and looking great in your slimmest bathing suit!

By Discovery Fit and Health Writers

Sometimes people choose not to eat for religious, political or health reasons. It's called fasting, and it's been popular for thousands of years. What effects does fasting have on the body? Is it safe?

By Alla Umanskiy

The function of the respiratory system is to bring oxygen to all the parts of your body. Learn what the function of the respiratory system is in this article.

By HowStuffWorks.com Contributors

The respiratory system organs include the airways, the lungs, and the blood vessels and muscles attached to them. Learn what the respiratory system organs are in this article.

By HowStuffWorks.com Contributors

The respiratory system has several ways to defend itself, including cilia fibers. Learn more about how the respiratory system defends itself from this article.

By HowStuffWorks.com Contributors

Teens brains really function differently than adult brains. Learn about the development of teens' brains in this article.

By HowStuffWorks.com Contributors

Whenever you delve into the realm of the paranormal, you're bound to feel the heat of argument between skeptics and believers. Why not end the argument once and for all and locate the part of the brain that may (or may not) control ESP?

By Heather Quinlan

Dehydroepiandrosterone, or DHEA, has a growing reputation as an anti-aging supplement among vitamin users and doctors. Learn about the risks, benefits and controversy of DHEA.

By the editors of PureHealthMD

Testosterone is one of the most important, but commonly misrepresented hormones found in the body. Learn about the role of testosterone.

By the editors of PureHealthMD

The health of the adrenal gland is of primary importance to help prevent and treat chronic disease. Learn about techniques for maintaining the health of the adrenal gland.

By the editors of PureHealthMD

Thyroid metabolism is complex, and each step can be influenced by nutrition, prescription medications and lifestyle factors. Learn how thyroid metabolism works and discover techniques for maintaining health.

By the editors of PureHealthMD

What makes your heart beat is not a simple as you think. Take a look into what makes this crucial organ tick with the help of the information inside this article.

By Maria Trimarchi

As you watch someone happily murder every song he belts out at the karaoke bar, you have to wonder whether it's caused by the growing bar tab, a total lack of embarrassment or simple tone deafness. Why do some of us hear music so differently?

By Tom Scheve

How does a 97-pound weakling become the World's Most Perfectly Developed Man, as Charles Atlas did? Through the sport known as bodybuilding. Here are 10 of the greatest, most well-known bodybuilders to grace the stage.

By Shanna Freeman

Memory, the mental process of bringing into the conscious mind material that has been learned and retained.

The lymph system is the body's drainage system. It is composed of a network of vessels and small structures called lymph nodes. Learn more about the workings of this crucial system.

By Editors of Consumer Guide

When you can't take your eyes of the boob tube for one entire Saturday afternoon, are you doing them irreversible damage? Your parents probably told you so, when you were a kid. Were they right?

By Debra Ronca

It's another one of those things your parents told you to persuade you to eat vegetables. But besides turning orange, if you ate a bunch of carrots, would you develop superhuman vision?

By Sarah Winkler

When bedtime comes far too early, a child may be tempted to read under their covers by flashlight. Parents say the habit will ruin your eyes -- but is this old admonition true or false?

By Molly Edmonds

In a way, your spine is the keystone that holds your body together. Since it has so many important jobs, it has to develop in exactly the right way. How does this happen?

By Tracy V. Wilson

If you still want to be spry after a few decades of birthdays have passed, then sit up straight (literally) and pay attention. We've got 10 tips to keep you in action into your sunset years.

By Tom Scheve

Babies have adorable smiles and teeny tiny fingers, but there's a persistent rumor that these new, tiny humans don't have kneecaps. What's the story of a baby's bones?

By Tom Scheve