The diagram illustrates the movement of materials between capillaries and tissue fluid. What might the numbered substances be?
- A1 carbon dioxide; 2 oxygen; 3 urea; 4 glucose
- B1 carbon dioxide; 2 urea; 3 oxygen; 4 glucose
- C1 oxygen; 2 glucose; 3 carbon dioxide; 4 urea
- D1 oxygen; 2 urea; 3 carbon dioxide; 4 glucose