The researchers then flushed the nanoparticles and cryoprotective solution out of the organs before replacing the rats' native kidneys with these transplants.
They use a no-rinse shampoo, spray themselves with water to rinse off the soap, and finally, use a vacuum hose which sucks up all the water from their bodies.
It’s also designed to be a reversible contraceptive, so scientists can theoretically break down the gel and flush it out with a second injection of a sodium bicarbonate solution.
And if you require moving parts in your design, the printer simply leave gaps in the right spots, or uses a special gel that can be dissolved or rinsed off afterwards.