Remember the biology class you had in high school? Well, maybe you don't or maybe now that you have a child, your interest in how the body works has grown.

Just as professional sports stars need medical care to keep them playing their best, so do student athletes. That's why it's important to make sure that kids and teens get a sports physical.

What should parents do when their child wants to quit a sport?

Learn more about head injuries (head trauma).

ACL injuries can happen in active and athletic kids when excessive pressure is put on the knee joint, resulting in a torn ligament.

Arthrocentesis (joint aspiratio) involves withdrawing (aspirating) a sample of fluid from a joint using a needle and syringe.

Many kids will have a broken bone at some point. Here's what to expect.

Concussions are serious injuries that can be even more serious if kids don't get the time and rest needed to heal them completely.

Ear injuries not only can affect a child's hearing, but sense of balance too. That's because our ears also help keep us steady on our feet.

Head injuries can be external or internal. Learn more about both kinds, how to prevent them, and what to do if your child is injured.

Concussions are serious injuries. Here's how to help protect kids and teens from them.

How long does a broken bone take to heal? Find out!

Jumper's knee is an overuse injury that happens when frequent jumping, running, and changing direction damages the patellar tendon.

Little League elbow is an overuse injury to the elbow caused by repetitive throwing. Most cases happen in pitchers, but any young athlete who throws a lot can get the condition.

MCL injuries can happen in active and athletic kids, when excessive pressure is put on the knee joint, resulting in a torn ligament.

Osgood-Schlatter disease (OSD) is one of the most common causes of knee pain in adolescents. It's really not a disease, but an overuse injury.

Panner's disease is a painful bone condition linked to overuse of the elbow. Kids with Panner's disease need to avoid all activities that cause pain so the bone can heal.

Patellofemoral pain syndrome (or runner's knee) is the most common overuse injury among runners, but it can also happen to other athletes who do activities that require a lot of knee bending.

Eye injuries in kids can lead to serious vision problems, even blindness. Wearing protective eyewear can prevent most eye injuries.

Sever's disease, a common heel injury in kids, is due to inflammation (swelling) of the growth plate in the heel. While painful, it's only temporary and has no long-term effects.

Shin splints are pain on the inner part of the shinbone, often from running or another high-impact activity. They get better with rest.

Torticollis is a common condition that causes a stiff neck or neck pain that makes it hard for kids to turn their heads.

Within a few days of a concussion, most students are ready return to school. Here's how parents can help.

After a concussion, athletes often ask how soon they can start playing again. Usually, they can return to sports when all symptoms are gone and a health care provider gives the OK.

Find out what the experts have to say.

When it comes to keeping your kid hydrated, there's a dizzying array of drinks to choose from. Are sports and energy drinks right for your child?

Emergency tooth preservation kits contain a sterile balanced salt solution, which is ideal for preserving an injured tooth until a person sees a dentist.

Organized sports can help kids grow in many ways. Consider your child's age, personality, and abilities to help make sports fun.

Milk and other calcium-rich foods help build strong, healthy bones. But most kids and teens don't get enough calcium. Here's how to make sure that yours do.

All kids need to eat balanced meals and have a healthy diet. But should that balance change for kids who play on a sports team or work out?

Kids who enjoy exercise tend to stay active throughout their lives. Learn how to encourage fitness in your teen.

Kids this age are naturally active, so be sure to provide lots of opportunities for your child to practice basic skills, such as running, kicking, and throwing.

Take advantage of your child's natural tendency to be active. Staying fit can help improve kids' self-esteem and decrease the risk of serious illnesses later in life.

School-age kids need physical activity to build strength, coordination, confidence, and to lay the groundwork for a healthy lifestyle.

Some kids aren't natural athletes and they may say they just don't like sports. What then?

When it comes to keeping your kid hydrated, there's a dizzying array of drinks to choose from. Are sports and energy drinks right for your child?

Sports supplements are products used to enhance athletic performance. But there aren't enough long-term studies to know if they're safe for teens.

With a properly designed and supervised program, strength training can be a fun way for kids to build healthy muscles, joints, and bones.

This glossary provides definitions for some common sports medicine terms.