A person who has genital herpes (often just called herpes) but no sores can still pass the virus to someone else. That's because the virus that causes herpes can be active in the body even if it doesn ...

Pyloric stenosis is a condition that can affect the gastrointestinal tract in babies. It can make a baby vomit forcefully and often, and can lead to other problems, such as dehydration. Pyloric ...

Rashes can be caused by viruses and bacteria, medicines, heat, allergies, and many other things. Rashes often are only minor problems, but some can be serious and need medical treatment.

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 ...

What Is the Digestive System? The digestive system breaks down the food we eat into tiny parts to give us fuel and the nutrients we need to live. As food breaks down, we get amino acids from protein, ...

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 ...

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 ...

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, ...

Feeling sad? You're not alone. Everyone feels sad at times. Sometimes sad feelings last only a moment. Other times, they last a little longer. It’s OK to feel sad. But sad feelings don't have to take ...

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 ...

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 ...

What Is an Umbilical Hernia? An umbilical hernia happens when part of a child's intestines bulges through the abdominal wall inside the belly button. It shows up as a bump under the belly button. The ...