Use the data in the table below to answer the question.
Phase
During Inhalation
During Exhalation
At Rest (No Inhalation/Exhalation)
Oxygen
Concentration in
Blood (%)
98
75
90
Carbon Dioxide
Concentration in
Blood (%)
5
23
10
Which phase shows the highest concentration of oxygen in the blood? Based on your knowledge of the
human respiratory system, explain why this phase would have the highest concentration of oxygen.