What Happens When Your Diaphragm Relaxes And Moves Upward?
What Happens When Your Diaphragm Relaxes And Moves Upward? When you breathe out, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to make the chest cavity smaller. As the chest cavity shrinks, air rich in carbon dioxide is forced out of your lungs and windpipe,