Many young kids have bow legs (genu varum), flat feet, knock knees (genu valgum), in-toeing, out-toeing, or toe walking. Often, as kids grow these conditions can correct themselves without treatment.

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 ...

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

Doctors recommend that all newborns get a dose of vitamin K at birth. Babies aren't born with enough of this important vitamin, which is needed for blood to clot normally. Without getting vitamin K at ...

What Is the Heart and What Does It Do? The heart is an organ that’s a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout your body, carrying ...

Every single person has a skeleton made up of many bones. These bones give your body structure, let you move in many ways, protect your internal organs, and more. It's time to look at all your bones — ...

Say hello to Chloe and Nurb and let them take you on a tour of the human body. You'll find out how the body's organs work and learn about body systems like the digestive system and brain and nervous ...

Reproduction is the process by which organisms make more organisms like themselves. But even though the reproductive system is essential to keeping a species alive, unlike other body systems, it's not ...

How much do you know about the urinary system, which makes pee? Find out by taking this quiz!

How much do you know about your lungs? Find out by taking this quiz!

A wet dream — also called a nocturnal emission — is when a male ejaculates or "cums" while sleeping. During ejaculation, semen (the fluid that carries sperm) comes out of the penis. When you wake up ...