The air inside our lungs moves in and out because of the movement of the diaphragm as well as the ribs and chest cavity. When we breath in our ribs push out and our diaphragm contracts to create a larger cavity inside your lungs. This causes an area of low pressure which therefore forces air down our trachea into our lungs. When we breath out the opposite happens (diaphragm relaxes and ribs pull in) which creates a smaller cavity in our lungs what therefore forces the air out of our lungs once respiration has taken place.
It should be noted that during inspiration as the intercostal muscles expand the rib cage and the diaphragm (more important for volume change) moves inferiorly, this creates negative pressure in the thoracic cavity relative to the atmospheric pressure.. consequently due to the pressure gradient, air can move into the lungs via the trachea. The negative pressure that is caused here is the main propellent of air. Whereas expiration, when the diaphragm and intercostal muscles return to resting position, thus restoring pressure to its normal levels is a passive process. The pressure gradient returns to normal and air can be expired.
The importance of the negative pressure created by the intrapleural cavity cannot be stressed enough.
The diaphragm, below the lungs, contracts causing a lower pressure in the lungs, and pulls the air in.
To exhale, the diaphragm relaxes, and the chest muscles contract, forcing the lungs to be smaller and the air to be pushed out.
As the diaphragm and intercostal muscles relax the volume of the lungs decreases. As intrapulmonary volume goes down, intrapulmonary pressure goes up. When the pressure inside the lungs exceeds the atmospheric pressure outside the lungs, air flows out and we exhale.
the diaphragm relaxes and that causes the ribcage to compress (get smaller) this pushes air out, and you have exhailed
The diaphragm rises. CO2 is forced out. With freeing the CO2 from Hgb and the lungs, the Hemoglobin can now pick up new oxygen molecules. The volume of the thoracic cavity decreases.
your muscles tightening and loosening
Evaporation.
it goes through the trachea/windpipe into your lungs and back out
When we talk, we tend to let small bits of air out. We proceed to get more oxygen in our lungs when we start pausing or breathing in between sentences and coversations.
The organ between the larynx and the bronchy and transport air in and out into the lungs.
lungs
It enter when you breathe. You let go of Carbon in your body when you breathe out, and let fresh air or oxygen enter your body when you breathe in.
breathing is the human action that causes the lungs to be filled with air.
Air leave the body from organs called the lungs.
Air enters through the trachea and into the lungs.
The diaphragm, below the lungs, contracts causing a lower pressure in the lungs, and pulls the air in. To exhale, the diaphragm relaxes, and the chest muscles contract, forcing the lungs to be smaller and the air to be pushed out. While having sex, this happens faster as we need more energy. ah! ah! ah! oh! oh!oh!
Air can enter the body by the mouth or the nose. Air then goes down the windpipe to the lungs where it can enter the bloodstream.
The nose and trachea prepare the air to enter the lungs. This is because the air first passes through these things, then into the lungs.