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Body Systems

Your body is pretty amazing. At any given point you have many biological processes going on -- circulatory, digestive, brain & central nervous systems and more. Learn about these body systems as well as the eye, ears, nose and throat.

Topics to Explore

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Children Can Regrow Their Fingertips. How Cool Is That?

Careful with that chopping knife! If you lose a fingertip, it's probably gone forever. With kids, however, that's not always the case. Why is that?

Could Your Smartphone Cause Temporary Blindness?

Maybe if you look at it with only one eye -- in the dark.

Why Do Opioids Cause Constipation?

Opioids can make your insides skid to a slow crawl. That's a problem when you consider nearly 250 million opioid prescriptions were written in 2013 by CDC estimates.

It's an Electrical Cheese Sandwich for Your Gut

You always wanted to eat electricity right? Now you can, and it might even provide a health benefit.

When It Comes to Q-Tips, We Do the One Thing We're Not Supposed to. Why?

Selfish humans act in our own self interest, but when it comes to cotton buds and ears we do exactly what science says not to. And yes, your doctor can tell.

An Historic Sneeze, a Disgusting Sneeze Cloud

We dig into the science and history of those delightful respiratory explosions we call sneezes, including one that's copyrighted.

The Case for Paying for Kidneys

Currently, all organs in the U.S. are donated. A report says paying $45,000 per kidney donation would end waiting lists and save taxpayer dollars.

Cow Burps, Not Farts, Are the Real Problem

Scientists discover that using a feed additive can decrease cow burps by 30 percent, vastly reducing greenhouse gas.

How Vocal Fry Works

Does vocal fry signal the most annoying end of times? Or is it just part of a natural language progression?

Is it possible to change your eye color?

Think your peepers are passé? Some cutting-edge cosmetic procedures can take your brown eyes to bright blue — with a few inherent risks.

Is it possible to cry blood?

Poetry is full of references to salty and bitter tears, but there's not much about bloody tears. Besides movie villains who weep blood, is this phenomenon real?

Is it possible to get taller as an adult?

Tired of standing on tiptoes when you pose for a photo with friends? If you're an adult looking to add a few inches to your frame, you might be out of luck.

Can holding in a sneeze kill you?

In some settings, you just can't heave a giant sneeze. If you hold back during a meeting or date, you're exhibiting decorum. Could you also be making a death wish?

What is mucus made of?

It's hard to imagine being thankful for mucus when you've got a nose full of it, but if it all went away you'd really be in trouble.

When you smell poop are you actually inhaling poop molecules?

Smelling fecal matter is gross enough, so the possibility that tiny bits of poop are actually getting into your nose is outright disgusting.

Where does earwax come from?

Earwax might seem like just another gross bodily substance, but it serves a very important function in the health of your ear canal.

Why is baby poop so smelly?

Tiny little babies are so sweet and cuddly. That is until you have to change their poopy diaper. What in the world is it that makes their poop so foul?

How do boogers form in your nose?

Boogers are more than an annoyance. Your body makes them for a very specific purpose — and it's not to gross out other people.

How fast does a fart travel?

We all pass gas, but not all of us like to talk about it — or study it to figure out how quickly it travels out of the body.

What are eye boogers?

As you're wiping away the crust from your eyes in the morning, do you ever ponder why it forms in the first place?

What are some safe ways to remove earwax?

Any doctor will tell you not to stick a cotton swab in your ear, although most of us disregard the warning. Luckily, there are safer ways to remove earwax.

What happens when you hold in a fart?

We're taught that it's impolite to pass gas in front of others, but could holding it in cause you health problems?

Is there a health benefit to picking your nose?

They say there are two types of people who pick their nose – those who do and those who lie about doing it. Would you be more prone to admit it if you found out it might be good for you? Let's see if it is.

Does mouthwash affect your immune system?

A swish of mouthwash after brushing makes our mouths feel fresh and clean. But some scientists think your mouthwash could be hurting your immune system. Is there something sinister lurking in your oral care routine?

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