Respiratory system 0.0 / 5 ? Health & Social CareAnatomy and physiology in practiceA2/A-levelOCR Created by: EandJ2013Created on: 25-01-15 13:50 34512 Across 1. The percentage of oxygen exhaled is (7, 7) Down 2. The flap that closes when swallowing (9) 3. Trachea to the (7) 4. Gaseous exchange takes place in the (7) 5. Bronchi to the (4)
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