| Front | Mechanism of respiration: forced expiration |
|---|---|
| Back | (Sneezing, coughing) Mechanism: 1. Deep inspiration 2. Closure of laryngeal opening (prevent outflow of air to build up intrathoracic pressure - Valsalva maneuver) 3. Contraction of abdminal and intercostal muscles to increase intrathoracic pressure (push abdominal viscera up and squeeze ribs in) 4. Sudden opening of larynx and relaxation of the diaphragm |
Tags: lung
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