I know that the diaphragm expands causing the air to leave the lungs. But what happens when the diaphragm contracts? How does this draw air in to the lungs?
In: Biology
When you expand your lungs it results in a pressure differential between the atmsophere around you and the space in your lungs. To resolve this differential air rushes in. It’s the same thing in reverse to letting go of a ballon that is not tied and the air rushing OUT – the pressure inside the balloon is higher than in the atmosphere. You use your muscles to expand the chest cavity and create a void in the space that is low pressure – air then fills it.
Latest Answers