In the comics that is actually his heart. You know comic book science is like *whew* and most people in the real world would be like "that is some bullshit that cant be his heart"

So they kinda made a real world application for it while keeping true to the comics. The thing is about Iron man is not that suit, Tony Starks is kinda like a cyborb in the comics. Let me break this down


Before he got hurt he had a real human heart, but he was doing inhuman things. He was acting like an ass and getting rich off people's suffering

After he gets injured his real human heart gets replaced but now he has more compassion for people then he ever had. Still he is human as he has many flaws listed in the comics (alcoholism, not being able to start a proper family, treating his fellow "superhero" brethen as underlings as opposed to friends.


<------Coming for that number one spot

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