Lungs


 * 1. Your left lung is smaller than your right one.**
 * 2. The word *lung* probably comes from *lunge,* the Old English word for *light.***
 * 3. Your lungs are your only organs that can float on water.**
 * 4. You have** 2414.016 km **of airways.**
 * 5. You take approximately 22,000 breaths every 24 hours.**