## Mechanical exhale - The diaphragm pushes upward, contracting the lungs and pushing out the air ## Effortless inhale - How the lungs fill 'automatically' when the muscles relax and the diaphragm pulls down - https://www.youtube.com/watch?v=79_dkwuZlhc&t=104 ## Models - https://museumsvictoria.com.au/scienceworks/at-home/play/make-a-model-of-the-lung/ - https://www.questacon.edu.au/outreach/programs/science-circus/videos/model-of-lung ## Related - [[Toys From Trash]]