One of the first tests you may have when you’re pregnant is a blood test to check your blood type and Rhesus (REE-suhs) factor, or Rh factor. Your Rh factor may play a role in your baby's health, so ...

Sometimes you need help to stay healthy! Learn about going to the hospital, what a dentist does, how stitches help, and more.

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 ...

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.

Do you know how to be street smart? Being street smart means knowing how to keep yourself safe from strangers when you're alone or with other kids. Whether you're walking to school or to the bus, ...

The nervous system controls everything you do, including breathing, walking, thinking, and feeling. This system is made up of your brain, spinal cord, and all the nerves of your body. The brain is the ...

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, ...

With all the running, climbing, and exploring kids do, it's no surprise that falls are common. Many falls cause only mild bumps, cuts, and bruises. But some can be serious and need immediate medical ...

Rejection doesn't have to be about the big stuff like not getting into your top college, not making the team, or not getting asked to prom. Everyday situations can lead to feelings of rejection, too, ...

What Is the Immune System? The immune system is the body's defense against infections. The immune (ih-MYOON) system attacks germs and helps keep us healthy. Many cells and organs work together to ...

Testicular torsion is an emergency condition. It happens when the spermatic cord, which provides blood flow to the testicle, rotates and becomes twisted. The twisting cuts off the testicle's blood ...

Parents often associate sexual development with the teen years. But kids develop an emotional and physical foundation for sexuality in many subtle ways from infancy. Physical and emotional changes ...