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ANATOMY AND PHYSIOLOGYImagine that you are a doctor and one of your patients is an active, 15 -year-old boy named Toua. Toua complains of tightness in his chest, wheezing, and breathlessness. Using a spirometer, you test Toua's lung volume. His test results (shown below) confirm your suspicion-Toua has asthma. Review Toua's test results and then answer the questions that follow. Tidal Volume (TV)=200 ml (Normal = 500 ml) Residual Volume (RV) = 600 ml (Normal = 1,200 ml) Total Lung Capacity (TLC) = 4,400 ml (Normal = 4,400 - 6,400 ml) Vital Capacity (VC)=3,000 ml (Normal = 4,500-5,500 ml) Inspiratory Reserve Volume (IRV) = 1,500 ml (Normal = 3,000 ml) Why is Toua's TLC in the normal range even though he has asthma?