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The arteriovenous oxygen difference, or a-vO 2 diff, is the difference in the oxygen content of the blood between the arterial blood and the venous blood. It is an indication of how much oxygen is removed from the blood in capillaries as the blood circulates in the body.
An arteriole is a very small blood vessel that leads an artery to a  capillary. The main function of the arteriole is to change the  blood pressure and velocity of blood flo â¦ w. Answered. In Human Anatomy and Physiology.