Why do your lungs inhale and exhale?

Answer 1

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.

Answer 2

Your diaphragm is the muscle that helps air move in and out of your body. It is a muscle below your lungs, contracting and relaxing as you breathe. When inhaling, the diaphragm contracts and moves down, causing the volume of your chest cavity to increase with air. This causes air pressure to reduce in the chest cavity, thus causing air pressure outside the body to increase and force itself into your air passage ways and into your lungs.

Answer 3

The reason for this is based on the basic gas laws that state that gases will move from an area of high concentration (or pressure) to an area of low concentration/pressure.

Another gas law (known as Boyle's law) states that as the size of the container a gas is in increases, the pressure will decrease (as the gas particles have more room to spread out)

These laws can be applied to inspiration:

When we inhale, the intercostal muscles between the ribs contract - this pulls the ribs upwards and outwards, increasing the size of the thoracic cavity.

The diaphragm will also contract and flatten, which further increases the size of the thoracic cavity

Because the volume has increased, the pressure inside the thoracic cavity will decrease, so that it is lower than the atmospheric pressure. Air (following the rule that gas moves from high pressure to low pressure) will therefore be drawn into the lungs.

Answer 4

so you can get oxygen in you body

Lungs inhale to supply the body with oxygen, they exhale to dispose of poisonous gasses such as carbon dioxide.

Answer 5

It doesn't. Exhale means breathing out, when air leave the lungs.

Answer 6

Air doesn't go into your lungs when you exhale, exhale means to breathe out. Air goes into your lungs when you inhale.