Sperm cells swim about the body
Biological component: Heart cells from newborn rats Size: 2 mm
In the future, biobots will be able to travel through the blood stream, delivering drugs or carrying out surgery. As the first step on the way, scientists from the US University of Illinois have developed a robot inspired by sperm cells. A 2-mm-long piece of plastic is the “sperm cell’s” head and tail. Heart cells are located between the head and the tail, and when they contract, they make the robot swish its tail and move.