Breast anatomy

Here’s a short list of the parts of the breast:

Lobes

Each breast has 15 to 20 sections called lobes that are arranged like the petals of a daisy. Each lobe has many smaller lobules, which end in dozens of tiny bulbs that can produce milk.

Ducts

The lobes, lobules and bulbs are all linked by thin tubes called ducts. These ducts lead to the nipple in the center of a dark area of skin called the areola.

Fat

Fat fills the spaces between lobules and ducts. There are no muscles in the breast, but muscles lie under each breast and cover the ribs.

Lymph

Each breast also contains blood vessels and vessels that carry lymph. ymph is a clear-to-white fluid made of two things:

• Fluid from the intestines called chyle, which contains proteins and fats
• White blood cells, especially lymphocytes, the cells that attack bacteria in the blood

The lymph vessels lead to small bean-shaped organs called lymph nodes, clusters of which are found under the arm, above the collarbone, and in the chest, as well as in many other parts of the body.