1.   Bioengineer Craig Halberstadt, of Carolina Medical Center in Charlotte, North Carolina, designs and grows breast tissue, which may one day replace saline implants.

2.   Doctors at New York University School of Medicine have grown liver tissue from bone marrow.

3.   Eventually, researchers hope to use the cells to grow tissue for human transplants or to introduce new or improved genes into people.

4.   If Advanced Cell Technology can produce viable hybrid cells, those cells will offer a new route to grow tissue for transplant.

5.   If researchers are able to use the cells to grow new tissues, the work could alleviate the shortage of livers and other organs for transplant.

6.   In recent years, scientists have begun trying to control stem cells to make them grow specific tissue, such as nerve cells to repair a severed spinal cord.

7.   In six weeks, a pea-size amount can grow enough tissue to cover a football field one-cell thick.

8.   It is a more expensive procedure and requires more time because it takes about three weeks to grow the tissue.

9.   Italian researchers have developed a technique that makes it possible to repair severely damaged corneas by growing replacement tissue in a laboratory dish.

10.   Other tissues can be grown in a laboratory, but the ex-vivo results are much harder to transplant to a patient.