Cells split [image 1] ... and separate [image 2].
From film footage of cells courtesy of Peter Friedman.

Cell Lines

If Moore's spleen remained in his body, it would have been very difficult and expensive to gain access to these overproduced lymphokines, and Moore himself might die. Moreover, as soon as the spleen was removed from Moore's body, the organ itself would die. However, Drs. Golde and Quan thought it might be possible to create a "cell line" from the surgically removed spleen.

Creating a cell line involves isolating a few cells from viable tissue and then enabling these cells to grow outside the body in a dish or tube. The cells in the dish or tube will divide -- that is, make copies of themselves -- and these copies can be given or sold to other researchers who want lymphokines for their research.