Which of the following is the correct direction of movement of gasses between the systemic tissues and the systemic capillaries?

a. COâ‚‚ and Oâ‚‚ both diffuse from the capillaries to the systemic tissue
b. COâ‚‚ diffuses from the systemic tissue to the capillaries
c. Oâ‚‚ diffuses from the systemic tissue to the capillaries
d. COâ‚‚ diffuses from the capillaries to the systemic tissue