We’ve now followed oxygen’s journey from the nose to the alveoli, where it enters the bloodstream and carbon dioxide exits. But we haven’t yet explored the powerful mechanisms and protective structures that make this exchange possible. Breathing isn’t just about lungs—it’s about muscles, bones, membranes, and pressure gradients, all working in harmony to keep air moving in and out of your body. Let’s take a … Continue reading How Your Body Protects and Powers Every Inhale and Exhale