The air moves from the outside into the lungs through the windpipe.
Trachea
The pressure inside the lungs decreases as the ribcage moves out and up. Air from outside basically gets pushed in by other air molecules due to the pressure gradient (air moves from a high pressure to a low pressure)
when air moves out of the lungs, the air pressure decreases
The muscle is the "diaphragm" muscle. It is located beneath the lungs. When it moves down and away, it creates lower pressure around the lungs, and the air pressure outside the body flows into the lungs. When it moves up and in, it compresses the lungs, increasing the pressure to force the air back out.
The bronchial tubes connect the trachea and the lungs. Air moves through these tubes into and out of the lungs.
the lungs will moves down when breathe out air
breathing.
the diaphragm
inhale:- the air pressure in the lungs decreases and air moves in. exhale:-air pressure in the lungs increases and air moves out.
Oxygen moves into the lungs where it is absorbed into the bloodstream through tiny air sacs called alveoli.
As the diaphragm contracts or retracts, the interior pressure of the lungs changes. As this pressure change occurs, the air pressure outside of the body remains unchanged. The resulting lack of pressure equality forces the air in or out of the lungs to maintain an equilibrium in the body pressure.
When your diaphragm contracts and moves downward, it increases the volume of the chest cavity, causing a decrease in air pressure in the lungs. This negative pressure then allows air to be drawn into the lungs through the airways.