Nanorobot. Computer artwork of a nanorobot (at centre right) dispersing/cutting up fatty deposits (yellow, at lower left) on a human artery wall. The nanorobot is using blades to cut up the blockage thus allowing it to disperse in the blood stream. Around the robot are disk-shaped red blood cells. Only 0.1 mm long, the nanorobot would get motive power from tiny steam engines heated by electric currents. Fatty deposits on the insides of arteries can cause atherosclerosis; the narrowing of these vessels can restrict the flow of blood to vital organs. Nanotechnology is the science of constructing machines from microscopic components.
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