. . Structure of Lobules . Normal Microscopic Appearance of Female Breast Tissue . . . . . . terminal duct lobular unit . . . . . . Leabharlann Baidu . . . . . Thank you! . 正常乳腺组织学 . Anatomy of the Breast Each breast lies over a muscle of the chest called the pectoral muscle. The breast is made up of: • lobules – glands that produce milk • ducts – tubes that carry milk from the lobules to the nipple • fatty and connective tissue • areola • nipple