Human Body

The human body is an amazing structure made up of many fascinating parts and systems. Learn about the human body and how its systems work together.

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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

For those of us who depend so heavily on our sense of sight, the idea of losing it is scary. Even scarier? The prospect of losing it without warning due to a silent thief called glaucoma.

By Molly Edmonds

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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

If you didn't have bones, you'd be puddled on the floor like a jellyfish with skin -- and your ability to impress people on the dancefloor would be severely compromised. What else are skeletons for, besides decorating your house for Halloween?

By Tom Scheve

Oh, to be a kid again. Plenty of summer vacation, plenty of mud puddles and plenty of osteoblasts? There's a reason your kid can spring back from any injury while you're laid up for weeks.

By Tom Scheve

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At night, your eyes adjust to darkness after several minutes. Do you know why it takes that long? Take a look at how your eyes adjust to darkness.

Chances are rather good you've heard the news that you have a thyroid -- but chances are also pretty decent you're not completely up to speed on exactly why you have one. What can your thyroid do for you?

By Jessika Toothman

By waxing, shaving, plucking and shearing, we manage to keep unwanted hairs at bay. But considering how much you shell out for new razors and your trips to the salon, it's a wonder that we bend over backward to groom a bunch of dead cells.

By Cristen Conger

Instead of just giving in to your food cravings, how about nourishing your brain? Take a look at the foods that kick-start your smarts. Here's a hint -- that candy bowl's not going to help.

By Molly Edmonds

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Every second of the day, blood bustles through your body, bound for your brain, toes and everything in between. How does your heart receive its fair share of the good stuff?

By Tom Scheve

When it comes to the heart, timing is critical. An irregular heartbeat is inefficient and deprives the body of blood. So what sets your ticker's rhythm?

By Julia Layton

Lub-dub, lub-dub, lub-dub, that's usually the sound of a happy heart. But what's responsible for that steady, comforting beat, and what if your heart doesn't sound like that?

By Tom Scheve

Everything we do is controlled and enabled by electrical signals running through our bodies. But how are those signals produced, and what happens when your electrical system breaks down?

By Julia Layton

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The heart is crucial to life and the focus of love. Explore the parts of the heart and how your heart works, plus take a look at real pictures of human hearts with this gallery.

Have you ever wondered what your body looks like on the inside? Take a tour of your major bodily organs and learn about unusual organ conditions with these pictures.

A healthy brain works better longer, keeping memory accurate and thought processes clear. Learn more about the benefits and options of brain teasers and mind games on your health.

By Madeline Roberts Vann, MPH

Although most people accept that some memory loss occurs with aging, it is also possible to take proactive steps to protect memory. Take a look at what we have uncovered about reversing the effects of memory loss with these 10 tips.

By Madeline Roberts Vann, MPH

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The brain is a complex grouping of nerve cells and other structures that help us think, react to the environment, make decisions and carry them out. Take an in depth look into one of the most interesting parts of the human body.

By DiscoveryHealth.com writers

The human body is fantastic biological specimen. Learn more about the human body with these revealing and insightful facts.

By DiscoveryHealth.com writers

Vestigial organs are like the contents of your junk drawer: an assortment of objects that once had a purpose or might come in handy. What can these evolutionary mementos tell us?

By Molly Edmonds

It happens more often than you may think. Sometimes a baby is born with organs outside of his or her body and has a slim chance of survival. What causes this?

By Jacob Silverman

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Most people's organs follow the same basic layout -- heart on the left, appendix on the right and stomach in the middle. But in about 1 in 10,000 births, organs end up on the opposite side.

By Jacob Silverman

What does your brain really look like? It depends on how it's imaged. Take a look at all the different ways we can view the human brain.

By Sara Cheshire