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.

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 ...

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 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 ...

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 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, ...

Most blood tests take only a few minutes. They’re done at some doctor’s offices, and at community labs, diagnostic centers, and hospitals. A doctor, nurse, or phlebotomist (fleh-BOT-eh-mist, someone ...

What Is Jumper's Knee? Jumper's knee is an injury of the patellar tendon. The patellar tendon is the cord-like tissue that joins the patella (kneecap) to the tibia (shinbone). Jumper's knee is an ...

What Is a Comprehensive Metabolic Panel Test and Why Is It Done? The comprehensive metabolic panel (CMP) is a blood test that gives doctors information about the body’s fluid balance, levels of ...

Salty, sour, sweet — you couldn't taste any of that without a tongue. Find out how your tongue works in this movie.

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 ...