Breathing

Question 1

What happens when you inhale

Answer 1

• Your diaphragm and intercostal muscles contract, expanding your chest cavity.
• This increases the volume of your lungs and decreases the pressure inside them compared to the outside atmosphere.
• Because of this lower pressure, air flows into your lungs.

Question 2

What happens when you exhale

Answer 2

• Your diaphragm and intercostal muscles relax, making your chest cavity smaller.
• This decreases the volume of your lungs and increases the pressure inside them compared to the outside atmosphere.
• Because of this higher pressure, air flows out of your lungs.