The breast would not contain muscles. Breast tissue is located on top of the muscles of your chest wall. Blood vessels and lymphatic vessels (a procedure of vessels that drains fluid) can be found all over the breast. Breast tissue begins to variety while in the fourth week of fetal https://grok.com/share/c2hhcmQtMw%3D%3D_21b4ddf4-c274-418a-a078-c9d2af4898ff