The Mechanism of Breathing
- Created by: hannahx
- Created on: 04-01-13 18:28
View mindmap
- INSPIRATION
- 1. External intercostal muscles contract, while internal relax
- 2. The ribs are pulled up and out, increasing the volume of the thorax
- 3. The diaphragm muscles contract, causing it to flatten, which also increases the volume of the thorax
- 4. The increased volume of the thorax results in reduction of pressure in the lungs
- 5. Atmospheric pressure is now greater than pulmonary pressure, and so air is forced into the lungs
Comments
No comments have yet been made