The breast will not include muscles. Breast tissue is located in addition to the muscles of the chest wall. Blood vessels and lymphatic vessels (a method of vessels that drains fluid) can be found all over the breast. These implants are made of a thicker, much more cohesive silicone gel https://grok.com/share/c2hhcmQtMw%3D%3D_21b4ddf4-c274-418a-a078-c9d2af4898ff