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Which has a lower pressure the air in your lungs as you inhale or the air outside your body?
Air moves from a higher pressure region to a lower pressure region. As you inhale, the air moves from outside your body to inside your lungs, so the air in your lungs has a lower pressure.
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The air pressure in a tornado is lower than that outside the tornado. That is why the wind blows toward the funnel.
The air moves from the outside into the lungs through the windpipe.
Breathing involves changes in air pressure inside and outside your body. When you inhale, your chest expands because muscles between your ribs push the ribs apart to make a bi…gger space. Also, a sheet of muscle in the lower chest, called diaphragm, moves downward to make a bigger space.
nose or mouth
There are a number of places in the body where the pressures are lower than atmospheric, or negative. For example, 1- When we breathe in (inspire) the pressure in the lungs mu…st be lower than atmospheric pressure. The lung pressure during inspiration is a few centimeters of water negative.
the rib muscles and diaphragm contract, increasing the lung volume.
the higher pressure is due to a greater number of gas particles per unit volume inside the ball then in the surrounding air.
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.
you breath. wrong. your muscles contract. ---- When you breath in, your diaphragm (a dome shaped muscular structure forming the floor of the thoraci…c cavity) and intercostal muscles (the muscles in the spaces between the ribs) contract. This causes the ribs to move upwards and outwards, and the diaphragm is pulled downwards, expanding the volume in the thoracic cavity. Because pressure decreases as volume increases, the pressure in the lungs becomes much less than the pressure in the atmosphere. Air moves from an areas of high pressure to areas of low pressure, so air is drawn into the lungs.
Nasal cavity Pharynx Larynx Trachea Bronchus Bronchioles Alveoli
very very variable... but there is a calculation that can be done its the forced expiratory volume / function residual capacity basically you breath out REALLY HARD, and then… take another big breath in, and then you can work out how much air remains in your lungs compared to how much you force out the average is around 85% plus below 80% and your looking at emphysema, and higher then this then your looking at obstructive disorders. as you can tell, this eliminates size as a factor in lung capacity, and simply gives us a nice round % which we can use on everyone, and get an average, so theres no real answer to your question...
air contains oxygen which is a requirement for our respiration process. oxygen enters into our lungs and into the blood and carbon dioxide is excreted and then exhaled out…..which is then used up plants to excrete oxygen. and thus a complete cycle!
Fresh atmospheric air.