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Heart Cells
Beginning of essay
“Crooners who lament that broken hearts never mend may need to find another tune.” Scientist are finding new evidence that suggests that, contrary to scientific consensus, heart muscle cells do divide and the number of cells can increase.
The vast majority of heart muscle cells, or myocytes, had be ....
Middle of essay
....2 myocytes in every million were dividing.
That proportion suggests that the cells of a damaged ventricle could be replaced within a year, the researchers calculate. However, many heart-attack victims do not recover their previous pumping efficiency nearly that quickly.
Researchers speculate that if new cells merely enlarge the heart, the weakened organ may suffer further damaging strain. If the cells grow in a way that thickens the heart wall, however, they might make the organ stronger. Scie.... |
| Number of words: 429 |
Approximate pages: 2 |
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