When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand.
The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
The muscle is the diaphram and it is located just beneath your lungs.
The action is the flattening of your diaphragm, or the muscle that helps your lungs inhale and exhale.
When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand.The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
Simple answer. All your life your lungs inhale and exhale oxygen. This is facilitated by the diaphragm, a muscle just below the lungs. When this muscle moves down a partial vacuum is created allowing the lungs to inflate filling the space created by the moving diaphragm, it then moves up again compressing the lungs and therefore expelling the air in them.
The action is the flattening of your diaphragm, or the muscle that helps your lungs inhale and exhale.
diaphragm
No, as you inhale the diaphragm is contracting and pulling down, expanding the lungs. As you breathe out, the muscle relaxes and rises up again.
The diaphragm of the lung is the muscle below the lungs that stretches the lungs, helping them expand when you inhale. When you exhale, it helps push air up out of the lungs.
It allows the lungs to expand when you inhale and they shrink when you exhale.
the lungs recoil/contract to push air out using its smooth muscle
The diaphragm relaxes during EXHALATION. Your diaphragm flattens when you inhale, creating more space for the lungs to take in more air.
When you inhale, oxygen fills your lungs. Next the oxygen diffuses out of your lungs into your bloodstream. The diffusion of oxygen from the lungs causes less pressure in your lungs signaling your brain that you need to inhale.