A-V Oxygen difference
The difference between oxygen concentration in the veins compared to Oxygen concentration in the arteries. (Artery might have 10, 5 lost is muscle, 5 in veins afterward).
Ventilation
Refers to the movement of air into and out of the alveoli.
VO^2 max
The maximum volume of oxygen that can be inhaled, transported and utilized in the body in one minute
What system/s does VO^2 max use?
It involves the respiratory, cardiovascular and muscular systems working together