The breast does not consist of muscles. Breast tissue is located in addition to the muscles in the upper body wall. Blood vessels and lymphatic vessels (a method of vessels that drains fluid) can be found throughout the breast. Breast augmentation is often a surgical procedure that improves the scale, https://grok.com/share/c2hhcmQtMw%3D%3D_21b4ddf4-c274-418a-a078-c9d2af4898ff