How does air travel the respiratory system?

Answer 1

when the diaphragm and external intercostal muscle contract we breath in and that's process called ventilation which is the movement of air between the atmosphere and the lungs. Ventilation has two phases.

1. inhalation or inspiration- to move air into the lungs.

2. exhalation or expiration- to move air out of the lungs.

in the second and third process of respiration the lungs emy ass

xternal respiration happen this is the exchange of the gases between lungs and the blood,next will be the internal respiration which is also exchange of air between the blood anmd to the body cells..

respiration is responsible for supplying the body cell preventing the to death..

Answer 2

when you inhale, the lungs expand and they are filled with oxygen. when the oxygen is picked up by the blood, you automatically exhale making your lungs contract and letting carbon dioxide out of your body

Answer 3

it enters through nostrils!