I've got inside calcium rich stickbones with meat attached feed by a red fluid predominant in a form of iron that takes oxygen from bags that suck in the outside air and uses it somehow via a piping system all around the muscle stuff and other bits. The red fluid also picks up CO2 from inside and takes it to the sucking bags to blow it away. The muscle meat and some calcium sticks protect a few filters and food processors and the whole lot is covered in a soft dry flexible skin that ranges from white to pink to redish brown. There's a computer thing on top with some sensors that make the whole thing function and assist with moving it about. It can be creative at times with inspiration utilising some external devices to make pleasant and stimulating sounds. I don't have a clue how it happened this way but it's pretty miraculous.