Scientists often use HeLa cells in their research. These are human cells from a sample that a doctor took (take) from Henrietta Lacks, an African American woman. In January 1951, Henrietta (went) to Johns Hopkins Hospital in Baltimore because she (discovered) a lump in her stomach. After examining her, her doctor (told) her she had cancer and to return to the hospital later for treatment. While he (was treating) her, he took a sample of her cells (gave) it to his colleague, Dr George Gey. At the time, Dr Gey (was trying) to grow human cells in his laboratory. On observing Henrietta's cells, he was amazed to see how fast they (grew). He (realized) that the sample would give him a line of cells that would never die. He (sent) some of the cells to colleagues in other countries, and soon researchers all over the world (were using) Henrietta's cells.
In August 1951 she (returned) to Johns Hopkins Hospital because her treatment (had not worked). Sadly, Henrietta (died) two months later. After more than two decades, Henrietta's family (found out) about the sample. They were angry that Henrietta's doctor (had not asked) for permission or told them about the importance of her cells. In 2013 the National Institute of Health finally (recognized) Henrietta's contribution to medicinal science.
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Ответ:The history of HeLa cells
Scientists often use HeLa cells in their research. These are human cells from a sample that a doctor took (take) from Henrietta Lacks, an African American woman. In January 1951, Henrietta (went) to Johns Hopkins Hospital in Baltimore because she (discovered) a lump in her stomach. After examining her, her doctor (told) her she had cancer and to return to the hospital later for treatment. While he (was treating) her, he took a sample of her cells (gave) it to his colleague, Dr George Gey. At the time, Dr Gey (was trying) to grow human cells in his laboratory. On observing Henrietta's cells, he was amazed to see how fast they (grew). He (realized) that the sample would give him a line of cells that would never die. He (sent) some of the cells to colleagues in other countries, and soon researchers all over the world (were using) Henrietta's cells.
In August 1951 she (returned) to Johns Hopkins Hospital because her treatment (had not worked). Sadly, Henrietta (died) two months later. After more than two decades, Henrietta's family (found out) about the sample. They were angry that Henrietta's doctor (had not asked) for permission or told them about the importance of her cells. In 2013 the National Institute of Health finally (recognized) Henrietta's contribution to medicinal science.
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