Origin and Insertion.
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Having trouble with the precise positioning of Kosta's pecs, I decided to try Google. Before beginning on the life-size figures I did do a lot of research, which included borrowing medical tomes and studying anatomy on-line. However I never actually Googled a specific body part, and here at my first attempt found apparently exactly what I needed: Origin and Insertion, including details of the specific ribs these muscles are attached to and how they are attached. This is particularly appropriate...