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Spirometry. Respiration External respiration – Gas exchange between blood and alveoli Internal respiration – Gas exchange between blood and tissue cells.

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Presentation on theme: "Spirometry. Respiration External respiration – Gas exchange between blood and alveoli Internal respiration – Gas exchange between blood and tissue cells."— Presentation transcript:

1 Spirometry

2 Respiration External respiration – Gas exchange between blood and alveoli Internal respiration – Gas exchange between blood and tissue cells

3 Pulmonary Ventilation Inspiration – Diaphragm and intercostals muscles contract resulting in increased volume and decreased pressure in the thoracic cavity; air rushes in

4 Pulmonary Ventilation Expiration – Diaphragm and intercostals muscles relax resulting in decreased volume and increased pressure in the thoracic cavity; air pushed out

5 Respiratory Volumes Tidal volume - normal amount of air inhales or exhaled Inspiratory reserve volume - amount of air that can be forcefully inhaled after normal inhalation Expiratory reserve volume – amount of air that can be forcefully exhaled after normal exhalation

6 Respiratory Volumes Vital capacity – maximum amount of air that can be exhaled after maximum inhalation Residual volume – amount of air that can be exhaled after maximum inhalation

7 Factors altering normal function Diseases Disorders Pollutants in the environment Trauma


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