How is the movement of oxygen in the body similar to and different to the movement of carbon dioxide?

So the movement of oxygen in the body is different to the movement of carbon dioxide as while oxygen enters the red blood cells during this movement the carbon dioxide stays out. It stays in the plasma. Also for the movement of carbon dioxide to happen oxygen is needed. Its a product of aerobic respiration.

The movement of oxygen in the body is similar to the movement of carbon dioxide as both processes require respiration and pass through the walls of the capillaries.