Answer:
As blood moves through the capillaries, the oxygen and other nutrients move out into the cells. Then waste matter from the cells goes into the capillaries. As the blood leaves the capillaries, it moves through the veins. Veins merge into larger tubes to carry the blood back to the heart.
Step-by-step explanation:
Blood moves continuously through the body, delivering oxygen and other materials to cells and removing carbon dioxide and other wastes from cells.