The skin is the heaviest part of the body and weighs up to 4.5kg ... Skin continuously renews itself - a human sheds the equivalent of a completelayer of skin every four weeks or 14kg of skin ...

The human body has different parts that help us do things like walk ... Keeping everything safely wrapped up is your skin. Most of us have the same kind of body parts in the same places.

The scaffold is covered with skin cells and cartilage cells ... Printing at least parts of the human heart should be possible, Atala says. What about the brain? “Definitely not in my lifetime!” ...