- Dilated section of duct to hold milk
- Fatty Tissue
- Pectoralis (pec) muscle
- Chest wall/rib cage
- Normal duct cells
- Basement membrane (duct wall)
- Lumen (center of duct)
- Lymphatics drain fluid that carries WBCs from the breast tissues into lymph nodes in the axilla and substernal region.
- Lymph nodes filter bacteria and play a key role in fighting off infection.
- Breast Gland
- Each breast has 15 to 20 lobes arranged like the petals of daisy.
- Inside each lobe are many smaller structures called lobules.
- At the end of each lobule are tiny sacs that can produce milk.