Question
3. Use the table below to summarise the major events of breathin?,
Major Events
Diaphragm and intercostal muscles will?
Ribs and diaphragm move?
Volume in chest is now?
Air pressure relative to outside is?
Air flow direction is now?
Inhalation
Exhalation
Answer
Inhalation: Diaphragm and intercostal muscles contract, ribs and diaphragm move up, volume in chest increases, air pressure relative to outside decreases, air flow direction is inward. Exhalation: Diaphragm and intercostal muscles relax, ribs and diaphragm move down, volume in chest decreases, air pressure relative to outside increases, air flow direction is outward.