The function of breasts is to produce milk for the baby. Each breast has milk producing glands (also called lobules or alveoli) that make milk from the nutrients and water they take from the bloodstream.
| Secondly, there are milk ducts that carry the milk to the nipple from the milk glands. The system of milk glands and ducts resembles several bunches of grapes: the glands are the grapes, the ducts are the stems. Like grapes come in bunches, the milk glands and ducts also are organized into several clusters that are called lobes. The breast actually has 15-20 of these lobes or grape bunches in it. From outside, the lobes feel like little nodes or lumps especially before menstruation    |
