Girls have lots of questions about the body changes of puberty. When will my breasts grow? What's the "normal" age to get your first period? Watch this video and find out!

The name fat may make it sound like something you shouldn't eat. But fat is an important part of a healthy diet. Fat from your diet gives you energy. As a bonus, fat in food helps you feel full, so ...

How Does Air Enter the Respiratory System? Air enters the respiratory system through the nose or the mouth. If it goes in the nostrils (also called nares), the air is warmed and humidified. Tiny hairs ...

Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by vertebrae, a set of ring-shaped bones. They're both cushioned by layers of ...

As your body develops, you might hear all sorts of rumors, like touching or massaging breasts makes them grow. That’s not true. There's plenty of wrong information out there about breast development.

Fifth disease is a viral illness that most kids recover from quickly and without problems. It's especially common in kids ages 5 to 15. Fifth disease is known for a rash that makes a child’s cheeks ...

As you've probably noticed, puberty comes with all kinds of changes — including the way your body looks and even the way you might think it smells. These changes are a normal part of becoming a woman, ...

Many things can lead to hearing loss, but often, no cause is found. Hearing loss is more likely if a child: Some hearing problems come on gradually after birth or show up later in life. If you are ...

Spiders are arachnids (as are ticks, mites, and scorpions), not insects. Spiders rarely bite people. When they do, it’s usually in self-defense because they’re being crushed by a human. Usually, their ...

infection in the urinary tract irritation or injury of the genital area stones (small masses of minerals) in the urinary tract Urinary tract infections (UTIs) are the most common cause of pain during ...

Most blood tests take only a few minutes. They’re done at some doctor’s offices, and at community labs, diagnostic centers, and hospitals. A doctor, nurse, or phlebotomist (fleh-BOT-eh-mist, someone ...

Answering kids' questions about sex is a job many parents don’t look forward to. It may feel awkward when it comes to talking about puberty and where babies come from. But don’t avoid these topics.