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1 In a sterile operating room in a hospital at Sichuan
University, in China, a rhesus monkey lay on a table.
Around the animal, surgeons prepared for one of the
most exciting operations of their lives.

2 With studied precision, the surgeons replaced a
2-centimeter segment of a damaged artery in the
monkey’s abdomen with a new blood vessel. The

procedure was then repeated on a total of 30
monkeys. One month later, the monkeys were not
only healthy, they were thriving.

sterile Something that is totally sterile is very clean and free from bacteria.
artery An artery is a blood vessel (one of many) that carries oxygen-filled blood
from the heart to every part of the body.
abdomen The abdomen is the part of the body that contains the stomach and
digestive organs.

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