Could we add human made material in our body without rejection?

NO.

There are many kinds of transplants, and human to human organ transplantation is known as allograft.

Allograft is most safe compare to xenograft ( tissue transferred between diff species-ani)

There also other transplant known as autograft and isograft.

There are many factors u need to consider before transferring an organ into human.

Among most matter are MHC and blood compatibility and also minor MHC compatibility.

You see, even if there are so much similarities, even transplant among twin, the recipient will need to take some sort of immunosupressant.This is because, rejection can occur hyper acutely, acutely, or chronically. And even when a recipient seems ok at first few years there are possibilities he will reject the organ in later years.

Our immune system is a very complex system. And they do not provide tolerance towards anything foreign, including man made material, UNLESS scientists can work this out.Like, they need to made an organ that molecularly, perfectly fit the recipient. Which is difficult because different recipient have different HLA, blood type and etc.

I hope this help.

Anybody can fly. It's the landing safely part without busting open like a watermelon that's tricky. I don't want to fly. It just sounds sissy. I'd rather be a ground pounder. Teleportation would be fine I suppose if I can find my entangled counterpart. Myself being large than a subatomic particle I don't see it happening. I choose time travel which may play into teleportation.

How do you think artificial hearts fit in to this picture. Shunts- for kidney patients.