Artificial jellyfish created from heart cells
Scientists in the US have created a free swimming artificial jellyfish.
The team members built the replica using silicone as a base on which to grow heart muscle cells that were harvested from rats.
They used an electric current to shock the Medusoid into swimming with synchronised contractions that mimic those of real jellyfish.
The advance, by researchers at Caltech and Harvard University, is reported in the journal Nature Biotechnology.
The finding serves as a proof of concept for reverse engineering a variety of muscular organs and simple life forms.
Because jellyfish use a muscle to pump their way through the water, the way they function - on a very basic level - is similar to that of a human heart.
"I started looking at marine organisms that pump to survive," said Kevin Kit Parker, a professor of bioengineering and applied physics at Harvard.
"Then I saw a jellyfish at the New England Aquarium, and I immediately noted both similarities and differences between how the jellyfish pumps and the human heart.
"The similarities help reveal what you need to do to design a bio-inspired pump."