Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


When the air goes in, the diaphragm expand 
when the air goes out the diaphragm  going to smal 

2 4 2
When you breath or inhale,the diaphragm muscle contracts.Inhaling moves the diaphragm down and expands the chest cavity.Simultaneously,the ribs move up and increase the size of the chest ca.There is now more space and less air pressure inside the lungs. Air pushes in from the outside where there is higher air pressure. It pushes imo the lungs where there is a lower air pressure . When you breath out or exhale , the diaphragm muscle relaxes . The diaphragm and ribs return to their original place. The chest cavity returns to its original size. There is now less space and greater air pressure inside the lungs . It pushes the air outside where there is a lower air pressure.
6 4 6
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts