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Oxygen journey | Mean partial pressure of oxygen |
Inspired air | 21.2 |
Trachea | 19.9 |
Alveolar gas | 14.6 |
Arterial blood | 13.3 |
Peripheral tissues | 3.3 |
You will see from Table 1 that there is a drop of almost one-third in the partial pressure of oxygen between the atmosphere and the alveoli. There are several reasons for this.
Try to list three reasons in the space below.