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 ...
A cochlear implant is a surgically placed device that helps a person with severe hearing loss hear sounds. The cochlea is a snail-shaped part of the inner ear. It turns sound vibrations into ...
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 ...
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 ...
What Does the Brain Do? The brain controls what you think and feel, how you learn and remember, and the way you move and talk. But it also controls things you're less aware of — like the beating of ...
What Is the Digestive System? Food is our fuel, and its nutrients give our bodies' cells the energy and substances they need to work. But before food can do that, it must be digested into small pieces ...
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 ...
What Are Bones and What Do They Do? Bones provide support for our bodies and help form our shape. Although they're very light, bones are strong enough to support our entire weight. In this soft bone ...
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 ...
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 ...
It’s fun to travel. But being away from our usual eating and sleeping routines can make it more likely for someone to get sick. It takes time to adjust to the food, water, and air in a new environment ...
What Is the Respiratory System? When we breathe, the respiratory system takes in oxygen and sends out carbon dioxide. The cells in our bodies need fresh oxygen to stay alive. As cells do their jobs, ...
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