RT Book, Section A1 Karam, Amer A2 DeCherney, Alan H. A2 Nathan, Lauren A2 Laufer, Neri A2 Roman, Ashley S. SR Print(0) ID 56964006 T1 Chapter 5. The Breast T2 CURRENT Diagnosis & Treatment: Obstetrics & Gynecology, 11e YR 2013 FD 2013 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-163856-2 LK obgyn.mhmedical.com/content.aspx?aid=56964006 RD 2024/03/29 AB The breasts are secondary reproductive glands of ectodermal origin. They are frequently referred to as modified sweat glands. Each breast lies on the superior aspect of the chest wall. In women, the breasts are the organs of lactation, whereas in men, the breasts are normally functionless and undeveloped.