50.0 MB (4.6 MB compressed)
3620 x 4827 pixels
30.7 x 40.9 cm ⏐ 12.1 x 16.1 in (300dpi)
GUNILLA ELAM / SCIENCE PHOTO LIBRARY GUNILLA ELAM / SCIENCE PHOTO LIBRARY
Stem cells, illustration. Stem cells are undifferentiated cells that can produce other types of cell when they divide. There are three main stem cell types in mammals: embryonic stem cells, derived from blastocysts; adult stem cells, which are found in adult tissues; and cord blood stem cells, which are found in the umbilical cord.
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