And the fat tissue basically determines the size of the breast and it also determines the softness of the breast. So the more fat we have in the breast, the larger the breasts are. Now we also have these blood vessels and the blood vessels consist of arteries as well as of veins. The arteries carry the oxygenated and nutrient filled blood to the cells of the breast while the veins carry away the deoxygenated and deoxygenated blood that contains the waste products away from the cells found inside the breast. And finally, around the nipple we have this relatively dark region of tissue known as the Arola. So the areola is a small circular structure that is colored differently than the surrounding tissue and this is found around the actual nipple.