Right-click the picture you want to change. Click Format Picture. In the Format Picture dialog box, click the Picture tab. Under Image control, click Washout in the Color list, and then click Recolor.
There are three major types of blood vessels: the arteries, which carry the blood away from the heart; the capillaries, which enable the actual exchange of water and chemicals between the blood and the tissues; and the veins, which carry blood from the capillaries back toward the heart.
Veins are blood vessels which carry deoxygenated (or very low levels of oxygen) blood back to the heart.The exception to this rule is the pulmonary vein, which carries oxygenated blood, from the lungs, back to the heart, ready to be pumped around the rest of the body.eins are blood vessels which carry deoxygenated (or very low levels of oxygen) blood back to the heart.