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the diaphragm relaxes and that causes the ribcage to compress (get smaller) this pushes air out, and you have exhailed
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I believe that the pressure from the diaphragm causes our lungs inflate, thus we inhale and when the diaphragm deflates, it makes us exhale. -------------------------------…-------------------------------------- As your diaphragm or intercoastal muscles contract the size of the lungs increases. This creates a pressure difference between your lungs and the surrounding atmosphere. By increasing the size of the lungs you create a low pressure environment in the lungs by expanding the same amount of gas to a larger area. this pressure difference doesn't have to be much 1mmhg is more then enough, the main thing is just that you need a difference in preasure. Air flows from high preasure to low preasure, so by decreasing the preasure in the lungs air flows into the lungs. as you breath out you make the lungs smaller by relaxing the muscles and diaphragm, making the volume in the lungs decrease, thus increasing the preasure and moving the air from inside the lungs out to the surrounding atmosphere.
When this happens, your lungs and the rib cage (with muscles between each rib) expand when inhaling, and return to their previous size.
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.
The intrapulmonary pressure is greater than the atmospheric pressure and air is going to flow from high pressure to low pressure.
When you breathe out, or exhale, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to reduce the space in the …chest cavity. This is done because the lungs become smaller
The air left in your lungs after exhaling is called "Expiratory Reserve".
It doesn't. Exhale means breathing out, when air leave the lungs.
when you inhale your lungs expand when you exhale they deflate because the air leaves the lungs.
When you breathe in, your diaphragm will contract, causing your lungs to expand and suck in air. When you breathe out, your diaphragm will relax, causing your lungs to shrink …and force out air.
By not breathing
your muscles tightening and loosening
So the blood can be oxygenated
We exhale more oxygen than we use. Air contains approximately 20% Oxygen - when we breathe in - we absorb about 4% of the oxygen - and exhale the rest.