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 ...

What Are the Spleen and Lymphatic System? The spleen is located in the upper left part of the belly under the ribcage. It helps protect the body by clearing worn-out red blood cells and other foreign ...

What Is Developmental Dysplasia of the Hip? Developmental dysplasia of the hip (DDH) is a problem with the way a baby's hip joint forms. Sometimes the condition starts before the baby is born, and ...

When most adults think about exercise, they imagine working out in the gym, running on a treadmill, or lifting weights. But for kids, exercise means playing and being physically active. Kids exercise ...

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 ...

What Does the Heart Do? The heart is a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen to every cell. After ...

Few parents ever imagine that their child will grow up to do drugs, but drug usage among kids and teens is a stark reality. Drugs are everywhere — from big cities to small towns — and are used by ...

We've all had cuts and scrapes that we can take care of at home. But what about more serious wounds — the kind that involve stitches or a hospital stay? The deeper, larger, or dirtier a wound is, the ...

Click through this slideshow to learn more about the kidneys and urinary tract. The bean-shaped kidneys filter waste products out of the bloodstream and dispose of them by creating urine. Urine is ...

The thyroid (say: THYE-royd) is a gland, which is an organ that makes special chemicals called hormones (say: HOR-moans). The thyroid is shaped like a little butterfly or bow tie and it sits under the ...

Baths do more than keep your baby clean. They also give you a chance to bond. With a little planning and practice, both you and your baby will look forward to bath time. Here are the basics about ...

Parents might be surprised by how their newborn looks. Before birth, babies are immersed in amniotic fluid and folded up in an increasingly tight space. Then in most deliveries, they're pushed through ...