The temporomandibular joint (TMJ) connects the lower jaw to the skull. You can feel your two TM joints and their movement by placing your fingers directly in front of your ears and opening your mouth.

From enjoying the great outdoors to playing sports safely, here's how to protect yourself and deal with emergencies.

Sometimes you need help to stay healthy! Learn about going to the hospital, what a dentist does, how stitches help, and more.

What Is the Digestive System? The digestive system breaks down the food we eat into tiny parts to give us fuel and the nutrients we need to live. As food breaks down, we get amino acids from protein, ...

We see and hear about hearts everywhere. A long time ago, people even thought that their emotions came from their hearts, maybe because the heart beats faster when a person is scared or excited. Now ...

The male reproductive system is made up of the parts inside and outside the body that help a male make a baby. Both the male and female reproductive system are needed for this. The male reproductive ...

You've probably heard countless times how exercise is "good for you." But did you know that it can help you feel good too? Getting the right amount of exercise can rev up your energy levels and even ...

Doctors use certain milestones to tell if a preschooler is developing as expected. There's a wide range of what's considered normal, so some children gain skills earlier or later than others. Kids who ...

Quick! What's the body's biggest organ? You might be surprised to find out it's the skin, which you might not think of as an organ. No matter how you think of it, your skin is very important. It ...

Have you ever seen liver and onions on a diner menu? If so, we're guessing you said "yuck" and ordered something else. But did you know that there's one liver you don't have to order? It's always ...

What Is a VP Shunt? A ventriculoperitoneal (VP) shunt is a thin plastic tube that helps drain extra cerebrospinal fluid (CSF) from the brain. CSF is the saltwater that surrounds and cushions the brain ...

Acanthosis nigricans (pronounced: ah-kan-THO-sis NY-gruh-kans) is a skin condition. It causes thicker and darker patches or streaks, usually in skin creases and folds, such as the sides and back of ...