what protects your lungs
Your rib cage goes around your lungs and heart to protect them from damage. Your ribs also move when you breathe in and out. Below your lungs is the diaphragm (say dye-a-fram). This is a big muscle that works with your lungs to get air in (inhale) and out (exhale). You can feel how they work together. 1  Put one hand on your chest and the other on the upper part of your tummy. 2  Now breathe in deeply.