I don't see any untoward sharp edges. Though connecting the main blood pipes are would be an interesting trick to know about. No hose clamps there! A colleague

I don't see any untoward sharp edges. Though connecting the main blood pipes are would be an interesting trick to know about. No hose clamps there! A colleague of mine required to have much metal put in his arm bones after an accident. He mentioned it always felt a bit heavy and cold. I can't imagine what this would feel like in your chest.