Your lungs give the red cells in your blood fresh oxygen. You get new, clean oxygen from the air you breathe in. You get rid of carbon dioxide, gas you don't need in your body, when you breathe out. So, your lungs are very important. They clean your blood to keep your body strong and help your brain think.
Healthy lungs are pink .
Here are some lungs for you to print out and color pink . Smokers breathe in poisons that make their lungs unhealthy. The lungs have to work much harder to do their job. Tar is one of the poisons that smokers put into their lungs. And that's what is left in a smoker's lungs after smoking a cigarette.