Free help with homework

Why join Brainly?

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



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Inhale- oxygen
exhale- carbon dioxide; deoxygenated gas
1 1 1
When you inhale-the intercostal muscles contract, expanding the ribcage- the diaphragm contracts, pulling downwards to increase volume of the chest- pressure inside the chest is lowered air is sucked into the lungs.
When you exhale-the intercostal muscles relax, ribcage drops inwards and outwards- the diaphragm relaxes, moving back upwards to decrease volume of the chest- pressure inside the chest increases and air is forced out.
2 5 2
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