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Spirometry Nevada Health Science

Understand the process of external and internal respiration, as well as the mechanics of pulmonary ventilation. Learn about respiratory volumes and factors that can affect normal respiratory function. Suitable for students and those interested in respiratory health.

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Spirometry Nevada Health Science

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  1. SpirometryNevada Health Science

  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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