1.   But the industry has sought to protect experiments that involve cloning human cells in ways that could produce replacement nerve tissues, muscle cells and other therapies.

2.   Grossman supports embryo cloning for medical research, which seeks to harvest stem cells from week-old embryos to grow easily-accessible replacement tissues to treat disease.

3.   In the pursuit of generating fully youthful replacement tissues to repair old bodies, Geron has three powerful techniques to bring to bear.

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

5.   Once the cells are seeded on the scaffolding, the tiny mesh structure is implanted into the body in the spot where replacement tissue is needed.

6.   Q. Will using stems cells to grow replacement tissues or organs make surgery obsolete?

7.   Researchers hope stem cell research will lead to ways to grow replacement tissues for use in people with these and other conditions.

8.   Researchers hope to extract stem cells from these week-old embryos, then mold the flexible cells into easily-used replacement tissue for patients.

9.   Second, replacement tissues could be generated from human embryonic cells by driving them down the appropriate lineages with cytokines and other agents.

10.   Scientists hope eventually to use the cells to create replacement tissues and organs for people who are sick or injured.