21.   Embryonic cells may be longer-lived when implanted in the body than adult stem cells would, Daley said.

22.   Equating the scientific use of embryonic cells with abortion, they said his position violated his long-standing values.

23.   Embryonic cells, however, have their division timers set back to zero.

24.   Embryonic cells, such as those derived from fetuses, will develop into these cells if placed in the dopamine region.

25.   He equates embryonic cell clusters with flesh-and-blood mortals as the basis for his opposition to human cloning for research.

26.   How surprising and embarrassing then that we might be slamming the door on cloning human embryonic cells.

27.   How then are embryonic cells generated from parents whose cells are irreversibly differentiated?

28.   Human embryonic cells are expected to behave in the same general way as mouse cells, although few studies of them have been done.

29.   Human embryonic cells can in principle provide an inexhaustible source of islets, and of many other critical tissues that are damaged in disease.

30.   However, many scientists and some patient research groups argue that embryonic cells may prove to be better and more versatile.