So let's begin by taking the following, by looking at the following diagram that describes the cross section of one of the female human breasts. Now, to the right of the actual breast we have the ribcage and these are the ribs shown in brown. Now connecting the ribs are the inter custardal muscles shown in red. And in front of the entire ribcage we have these muscles shown in pink, known as the pexiralis muscle. So we have the major and the minor pectoralis muscle and the pectoralis muscle is actually connected to the breast via connective tissue. Now, what about the breast itself?