What Are Reflexes

Reflexes are quick, automatic actions that your body does without you thinking about them. They help keep you safe and help your body work properly. When you touch something very hot, your hand pulls away fast. You do not have to decide to move your hand—your body does it automatically! That fast action is called a reflex.

The part of your body that controls reflexes is called the nervous system. The nervous system includes your brain, spinal cord, and nerves. Nerves are like tiny wires that send messages between your body and your brain. When you touch something sharp, nerves in your skin send a message to your spinal cord. The spinal cord tells your muscles to move your hand away even before the message reaches your brain. This helps you react quickly and avoid injury.

Some common examples of reflexes are blinking when something comes close to your eyes, coughing if something tickles your throat, and your knee-jerk response at the doctor. Reflexes happen the same way every time because they are automatic. They do not need you to think or make a choice.

Reflexes are important because they protect us. Animals also have reflexes that help them survive, like jumping away from danger. Our bodies use reflexes to help us move fast and stay safe in many situations.

Interesting Fact: Some reflexes, like blinking and breathing, happen all day and night—even when you’re asleep!