Structure of the mammary lobes. The female breast contains a complex network of glandular, fatty, and connective tissues. The mammary lobes form the functional part of this structure. Their main role is milk production during breastfeeding.
Each breast usually contains 15 to 20 mammary lobes. These lobes are arranged around the nipple in a radial pattern. Every lobe is divided into smaller structures called lobules. Lobules contain the alveoli, which are responsible for milk production.
The alveoli are lined with secretory cells. These cells respond to hormones such as prolactin and oxytocin. During lactation, they produce and release breast milk. The milk then flows from the alveoli into small channels known as lactiferous ducts.
The lactiferous ducts carry the milk toward the nipple. Near the nipple, the ducts widen and form the lactiferous sinuses. These small cavities temporarily store milk before it is released.
Connective tissue supports the lobes and helps maintain the breast structure. Adipose tissue also surrounds the lobes. This fatty tissue largely determines the size and shape of the breast.
The structure of the mammary lobes changes during different stages of life. Puberty, pregnancy, and breastfeeding cause important hormonal changes. These changes stimulate the growth and activity of glandular tissue.
During pregnancy, lobules increase in size and number. This prepares the breast for milk production. After breastfeeding ends, many of these changes gradually decrease.
Understanding the structure of the mammary lobes is important in medicine. It helps identify abnormalities in breast tissue. It also supports the early detection of conditions such as breast cysts or breast cancer.
Anatomical illustrations help visualize the organization of the lobes. These images show the relationship between lobes, ducts, and surrounding tissues. They make the study of breast anatomy clearer and easier to understand.