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.


Blue light-blocking glasses are super popular these days. But do they even work the way marketers promise?

What's behind the fact that you can drink three cups of coffee and still feel sleepy while your coworker feels jittery after one cup? Our bodies all process caffeine differently. Here's why.

James Harrison's blood contains a rare and powerful antibody that's saved millions of Australian babies. Now, at age 81, after donating 1,173 times, he's hoping someone else will pick up where he left off.

Music festivals are a blast, but research shows they can also be a bummer for your ears. One study even says that alcohol, coupled with loud music, can make the hearing loss worse.

Enter the Fartonomicon with the guys from Stuff to Blow Your Mind. You're guaranteed to have a gas.

You had LASIK surgery a few years ago, and your vision has started to blur again. Is this normal?

Hamstrings are a group of three muscles running down the back of the thigh, and they have a lot to do with your flexibility.

Diplomatic staffers in Havana, Cuba, recently began to suffer from a series of health problems. Were they sound-related?

Holding hands can help regulate responses to stress, increasing trust and emotional well-being.

What would happen if you didn't (or couldn't) move your bowels for several weeks? Let's just say you'd be in a crappy situation.

Thermal imaging shows that as a person engages in intense mental tasks, their face, and in particular the area around the nose, becomes cooler.

The human system for excretion is actually pretty great, especially when you start looking at what other animals have.

Does it just taste bad or are there other reasons?

Although women often think men exaggerate their symptoms when they have a cold or flu, a Canadian scientist has found that men are more susceptible to respiratory complications than women.

When we've really got to urinate, kids and adults alike do the pee-pee dance. What are the theories behind the fidgeting?

New research finds that nontoxic, antibacterial sugars found in human breast milk might be key to the next generation of antimicrobial drugs.

If you find yourself running to the bathroom the minute you get home, experts posit this is a case of mind over bladder.

Colorblindness affects around 300 million people worldwide. What is it and how can glasses help?

Although we've often been told that dogs have a superior sense of smell to people, a new report says there's little difference.

Plenty of theories exist for why drinking an entire gallon of milk in one sitting is a challenge often undertaken, infrequently accomplished. Who's right?

Roller coasters: They're super fun, and they could help you pass a kidney stone without medical intervention. Who knew?

From killer sausages to canceling crows' feet, botulinum toxin has come a long way. Botoxwurst, anyone?

Is this you? This is totally you. Why do some people burst into violent sneezing fits when they encounter bright sunlight? Check your genetics.