Key differences, features, and comparative analysis of vs Inspiration.
| Inspiration | Expiration (normal) | |
|---|---|---|
| Diaphragm | Contracts, flattens | Relaxes, domes up |
| External intercostals | Contract; ribs & sternum up/out | Relax |
| Thoracic & lung volume | Increase | Decrease |
| Intra-pulmonary pressure | Below atmospheric → air in | Above atmospheric → air out (passive) |
This comparison table is part of the chapter notes for Breathing & Exchange of Gases. Get complete notes, flashcards, active recall sheets, and test prep modes: