Free help with homework

Why join Brainly?

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


  • Lav
  • Ambitious
Actually its supposed to be the bottle with the balloon so anyways. The bottle is the respiratory system when the balloon attached to it is flexed then that is the diagphram. Just relate it to the model or whatever but it varies in the schools :))
0 0 0
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