Inhalation and exhalation in lungs
- Created by: Steff06
- Created on: 11-04-16 11:24
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- Inhaling and exhaling (lungs):
- INHALING:
- 1. Diaphragm CONTRACTS to become flatter and pushes digestive organs down.
- 2. External INTERCOSTAL MUSCLES CONTRACT to raise ribs.
- 3. VOLUME of chest cavity INCREASES.
- 4. PRESSURE in chest cavity DROPS atmospheric pressure.
- 5. Air moves INTO LUNGS.
- EXHALING:
- 1. Diaphragm RELAXES and is pushed up by displaced organs underneath.
- 2. External INTERCOSTAL MUSCLES RELAX and ribs fall.
- 3. VOLUME of chest cavity DECREASES
- 4. PRESSURE in lungs INCREASES and rises above atmospheric pressure.
- 5. Air moves OUT OF LUNGS.
- INHALING:
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