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Medical technology applies engineering principles to the fields of biology and medicine, for example in the development of aids or replacements for defective or missing body parts. 1 _______.
Ultracane, as the name suggests, uses ultrasound (sound above the level of human hearing) to help blind people detect obstacles around them so that they can walk with more confidence. 2 _______. (Finding your location, as bats do, echoes from sound waves is called echolocation.) 3 _______. Robot surgeons are also used for keyhole surgery. 4 _______.