Breasts are made up of fat, supportive (connective) tissue and glandular tissue containing lobes. The lobes (milk glands) are where breast milk is made. They connect to the nipple by a network of fine tubes called ducts.
It’s common for a woman’s breasts to be a different size or shape from each other. They also feel different at different times of the month. For example, just before a period your breasts may feel lumpy. As you get older, your breasts may become smaller and softer.