http://www.independent.co.uk/news/sc...-a7648836.html

Researchers have turned a spinach leaf into working human heart tissue.

Scientists struggle to make large-scale human tissue – while they have had success in creating small lab samples, it is much more difficult to make them at the size of tissues, bones or whole organs. But that's what will be needed if the tissue proves useful in the treatment of disease or injury.

Now they have come closer to solving perhaps the hardest of those challenges ,and creating a vascular system that can deliver blood into the new tissue.

Until now, it has been hard to recreate the tiny, branching network of blood vessels using techniques like 3D printing. But researchers have solved it by turning to plants – and turning plants into tissue.