JULIAN BAUM / SCIENCE PHOTO LIBRARY JULIAN BAUM / SCIENCE PHOTO LIBRARY
Nanorobot. Artwork of a nanorobot (at upper left) removing a blockage of plaque (grey) from the wall of a human blood vessel. The nanorobot is using rotary blades to break up the blockage and sucking the fragments into nozzles. Around the robot are disk-shaped red blood cells. At right is the tip of the hypodermic needle used to inject the robot into the blood vessel. This type of robot, only 0.1 mm long, is a possible application of nano- technology to medicine. Plaque forms on the insides of arteries to cause atherosclerosis, restricting the flow of blood to vital organs. Nanotechnology is the science of constructing machines from microscopic components.
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