Kidney

Grown. [Link]

The artificial organs were created in a laboratory using human amniotic fluid and animal foetal cells.

They are currently half a centimetre in length - the same size as kidneys found in an unborn baby.

Scientists at Edinburgh University hope they will grow into full-size organs when transplanted into a human.

The breakthrough could lead to patients creating their own replacement organs without the risk of rejection, a common complication in transplant procedures.

Physiologist Jamie Davies, a professor of experimental anatomy at Edinburgh University, said: ''It sounds a bit science fiction-like but it's not.

''The idea is to start with human stem cells and end up with a functioning organ.

''We have made pretty good progress with that. We can make something that has the complexity of a normal, foetal kidney.''