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Respiratory volume measurement for humans

  1. Respiratory Volume Prepared by Atheena Pandian
  2. TOPIC DISCUSSED TODAY Respiratory Volume Lung Volume Lung Capacity Varies Volumes in Respiratory system 1. 2. 3. 4. Presentation
  3. Lung Volume Lung volumes are also known as respiratory volumes. It refers to the volume of gas in the lungs at a given time during the respiratory cycle.
  4. Lung capacities are derived from a summation of different lung volumes. The average total lung capacity of an adult human male is about 6 litres of air. Lung Capacity
  5. RESPIRATORY VOLUME MEASUREMENT There are a number of different measurements and terms which are often used to describe this including tidal volume, inspiratory reserve volume, residual volume, vital capacity and more.
  7. TIDAL VOLUME The amount of air which enters the lungs during normal inhalation at rest as opposed to exercising. So if you are sitting normally and breathing quietly then the amount of air breathed in is the tidal volume. The average tidal volume is 500ml.
  8. The amount of extra air inhaled (above tidal volume) during a deep breath. This can be as high as 3000ml. So if you breathe in the normal amount you would at rest, and then see how much additional air you can breathe in before you simply cannot breathe in anymore, then this extra amount is the inspiratory reserve volume. INSPIRATORY RESERVE VOLUME
  9. The amount of extra air exhaled (above tidal volume) during a forceful breathe out. So if you breathe out normally as you would, then try and breathe out even more until you physically cannot breathe out any more air, then this is the expiratory reserve volume. EXPIRATORY RESERVE VOLUME
  10. The amount of air left in the lungs following a maximal exhalation. There is always some air remaining to prevent the lungs from collapsing. This air that is always in the lungs is called the residual volume. RESIDUAL VOLUME
  11. The most air you can exhale after taking the deepest breath you can. So if you breathe in as much as you physically can and then measure the amount of air you can breathe out then this is known as the vital capacity. It can be up to ten times more than you would normally exhale at rest. VITAL CAPACITY
  12. This is the vital lung capacity plus the residual volume and is the total amount of air the lungs can hold. The average total lung capacity is 6000ml, although this varies with age, height, sex, and health. TOTAL LUNG CAPACITY