Everyone gets old, that's just a fact of life. However, some senior citizens defy all the things we have come to expect from the older generation. Anna Levushkina, an 89-year-old surgeon, continues to operate on patients in her home city of Ryazan despite her advanced age.

Anna Levushkina, who is believed to be the world's practicing oldest surgeon, has no problem going to the operating table and taking control of even the most complicated procedures. Her nurses and assitants don't seem to bat an eye as the elderly woman gives orders and makes the incisions.

Levushkina reportedly began working as a surgeon right after she finished her medical studies in Moscow right around 1948, just a few years after Hitler's armies were pushed out of Russia. She has worked as a octogenarian surgeon for more than 68 years, during which she has conducted more than 10,000 operations.