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.
Also to know is, what is the process of exhalation?
During this process, the chest wall expands out and away from the lungs. Upon exhalation, the lungs recoil to force the air out of the lungs. The intercostal muscles relax, returning the chest wall to its original position. During exhalation, the diaphragm also relaxes, moving higher into the thoracic cavity.
What are the steps of exhalation?
the steps of exhalation.
- step.1. the intercostal muscles relax.
- step.2. this causes the ribcage to move down and in.
- step.3. diaphragm muscles relax and shape the diaphragm as a dome.
- step.4. this causes a decrease in the volume of the rib cage and an increase in the air pressure.
What happens during inhalation and exhalation phase of breathing?
The process of breathing (respiration) is divided into two distinct phases, inspiration (inhalation) and expiration (exhalation). During inspiration, the diaphragm contracts and pulls downward while the muscles between the ribs contract and pull upward.