What happens to size of chest space when you exhale and inhale?

When you inhale, the diaphragm contracts and moves downward, while the rib cage expands, increasing the size of the chest cavity and allowing air to flow into the lungs. Conversely, when you exhale, the diaphragm relaxes and moves upward, and the rib cage contracts, decreasing the size of the chest cavity and pushing air out of the lungs. This change in chest space is essential for the breathing process.