Respuesta :

The body's oxygen transport system takes oxygen to the working muscles, through the circulatory and respiratory systems working together. The main workers are the heart, blood and lungs. The whole oxygen transport system works in a cycle. ... And this de-oxygenated blood is pumped back to the heart then on to the lungs.

Answer: oxygen moves from the respiratory to the circulatory system by diffusion across a capillary wall

Explanation: got it correct on my test!