Your Body

Your tonsils are two lumps of tissue at the back of your throat. They're part of your immune system. But what do they do, exactly? Let's take a moment to learn more.

This is a speech disorder. It involves the brain and the muscles that control speech. With this disorder, it's hard to make the muscle movements needed for speaking.

This is a group of emotional and behavioral problems in children. With it, a child does defiant and impulsive things. The child may break rules and cause problems for himself or herself and for other people. Eventually, this can lead to criminal behavior.

This is a sleep disorder that's most common in children. Those who have it wake up suddenly during the night. They can be scared and confused. You may not be able to calm them down.

This is a pain many kids feel in their legs. We call it "growing pains," but the pain isn't really linked to growing. Kids can feel it even in times when they aren't growing very much.

This genetic disorder affects only females. In some, it causes distinct physical features. And it affects how a girl grows and develops. It can also affect parts of the body like the heart.