@_.ojjs19 on Instagram‎: "‏Video link in Bio 🍑 The lungs are inside the chest, protected by the ribcage and wrapped in a membrane called the pleura. The lungs look like giant sponges. They are filled with thousands of tubes, branching smaller and smaller. The smallest components of all are the air sacs, called 'alveoli'. Each one has a fine mesh of capillaries. This is where the exchange of oxygen and carbon dioxide takes place. • The breathing muscles To stay inflated, the lungs rely on a vacu