A stem cell line is a family of constantly dividing cells, the product of a single group of stem cells. They are obtained from human or animal tissues and can replicate for long periods of time in vitro ("within glass"; or, commonly, "in the lab", in an artificial environment). They are frequently used for research relating to embryonic stem cells or cloning entire organisms.
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Famous quotes containing the words stem, cell and/or line:
“Bite down
on the bitter stem of your nectared
rose, you know
the dreamy stench of death and fling
magenta shawls delicately
about your brown shoulders laughing.”
—Denise Levertov (b. 1923)
“It is plain that there is no separate essence called courage, no cup or cell in the brain, no vessel in the heart containing drops or atoms that make or give this virtue; but it is the right or healthy state of every man, when he is free to do that which is constitutional to him to do.”
—Ralph Waldo Emerson (1803–1882)
“I love them
for finding what
I can’t find,
and for loving me
for the line I wrote,
and for forgetting it....”
—Denise Levertov (b. 1923)