How are body parts grown?
The new body part begins as a glass mould, based on the original, which is sprayed with a synthetic honeycomb-like material to create a framework for stem cells to cling to.
The mould is then removed and the honeycomb covered with millions of ‘blank cells’ which, with the right nutrients, can turn into the cartilage of the organ.
Meanwhile, the skin on another area of the body is gradually stretched by a small balloon placed under the surface and inflated until it is loose enough to accommodate the organ.
After several months, the body part is taken out from under the skin and sewn into the right place.