I am confused, I think many others posting on this thread are too or I wouldn't be so confused. I think half of you think backstraps are tenderloins, and tenderloins are backstraps. Someone stated they are not the same thing. I always thought they were the same. So does someone have diagram showing where each piece of meat is obtained. I think of the two pieces of meat that run right along the spine as back straps you don't need a knife to get them out although it makes it easier. Where are the tenderloins????