3b. <span> </span><span>always in your arm. Blood travels first to your arm from your lungs. Blood is oxygenated in your lungs. Therefore there is more pressure in blood near your lungs. The first places after lungs have hte most pressure. Then slowly it decreases. The legs get the least pressure. When blood goes across capellaries and the O2 is used up and the pressure is very low. It is lowest in veins since all oxygen has been used up. It is also lowest far away from the heart because the heart increases pressure.</span>