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.

Topics to Explore

Learn More / Page 9

16 Unusual Facts About the Human Body

Our list of 16 unusual facts about the human body will both shock and enlighten. Did you know that everyone has a unique tongue print or that we shed skin cells the same way a dog sheds hair?

13 People with Extra Body Parts

Extra body parts can occur more often than people might think. Doctors call the extra appendages "supernumerary" body parts and these can be found on some famous people in history.

How to Test Your Memory

Finding out what shape your memory is in should be the first step in trying to improve it. Test your memory to find out if those memory glitches are normal.

How to Improve Your Memory

You can improve your memory by taking several simple steps. You can make the decision to get better at remembering things today! Learn more about sharpening your memory in this article.

Improving Memory: Lifestyle Changes

Worried about memory loss? Fear not, there are still lots of lifestyle changes you can make to help prevent it, such as managing stress. Learn more about memory-saving lifestyle changes in this article.

Can humans regrow fingers?

Can humans regrow fingers? Fetuses can regrow almost anything that gets damaged while in the womb. But can adult humans can regrow fingers?

What if people had exoskeletons?

Exoskeletons normally cover insects, not humans. Why would a human ever want one? Is the possibility of an exoskeleton for humans just around the corner?

The Brain and Nervous System

The nervous system is a complex network of specialized tissues that regulates thoughts, emotions, actions, sensations, and body functions. It has two major divisions: the central nervous system and the peripheral nervous system.

The Endocrine System

The endocrine system comprises a number of glands that produce hormones with a varied array of vital functions. Hormones control or regulate the development or function of structures throughout the body.

Healthy Digestion

Healthy digestion involves the whole body. Learn about the processes and body parts that go into digestion.

The Heart: Introducing One Tough Muscle

The heart is one of the strongest muscles in the body. Learn about this extremely vital part of the body.

How Muscles Work

Muscles are one of those things that most of us take completely for granted, but they're the body's engine. Without our muscles, we couldn't walk or talk -- and our blood would stop flowing.

Are all blood types needed for for donation?

When you donate blood, your blood type is an important factor in how useful your donation may be. Just what are blood types?

What makes your arms, legs and feet fall asleep?

Having a limb fall asleep can range from annoying to downright painful. See what's going on inside your arm or leg when it falls asleep.

How Your Kidneys Work

The kidneys spend 24 hours a day, seven days a week filtering gallons and gallons of blood. But that's not all these little bean-shaped organs accomplish in a day.

How Your Lungs Work

You breathe in and out anywhere from 15 to 25 times per minute without even thinking about it -- it just happens naturally. Learn all about your lungs, various conditions and diseases, and what makes the breath of life so crucial.

How does your stomach keep from digesting itself?

Ever wondered how your stomach acid knows the difference between your stomach and the food inside it?

How Refractive Vision Problems Work

Millions of people have refractive vision problems -- when the eyes get blurry or can't focus on an object. Learn about four major types of refractive vision problems.

What makes your knuckles pop?

If you've ever laced your fingers together, turned your palms away from you, bent your fingers back and heard a loud crack or pop, you know what knuckle-popping sounds like. So, what would happen if you popped your knuckles all the time?

What does it mean when someone has 20/20 vision?

We all know 20/20 vision is a good thing, but just what do those numbers mean?

What is lymph?

Lymph is a commonly-used medical term, but what's it mean exactly?

What is an appendix and what causes appendicitis?

Your appendix is really a pretty mysterious organ. Find out why you have an organ that's not necessary to your survival.

Why do my ears pop when I dive in the deep end of the pool?

Your ears are very sensitive to the air or water pressure around them. But just what happens when you dive into that pool?

Why are boogers sticky?

You may never have thought about it (unless your child asks), but boogers are sticky for a perfectly logical scientific reason.

How much oxygen does a person consume in a day?

You breath all day, every day. How much oxygen does this process consume?


Recommended