Full Breast Description
[Continued from above] . . . probably differ more than any other part of the body. These not only differ in individuals but at separate phases of a woman's life-during pregnancy, during the menstrual cycle, and after menopause. The breasts are really modified sweat glands, which are made up of fibrous tissues and fat that provide support and contain nerves, blood vessels and lymphatic vessels. The darker pigment around the nipples is called the areola, and the nipples themselves become erect because of cold, breast-feeding or during sexual activity. The size of the breast cannot be increased by exercise because there are no muscles within it, but only ligaments, which interlace the fat and tissue. The amount of milk is not dependent upon the size of the breast (which is set by genetic heritage).