The mean thicknesses of several structures in the human respiratory system are shown. An oxygen molecule is in the alveolar air space, beside the wall of the alveolus. What is the minimum distance that the molecule must diffuse from its current position to the haemoglobin that completely fills a red blood cell in the nearest capillary? (Assume that the red blood cells are in contact with the walls of a capillary.)
- A595 nm
- B600 nm
- C605 nm
- D610 nm