Dividing cells showing chromosomes (purple) and cell skeleton (green)
This pig cell is in the process of dividing. The chromosomes (purple) have already replicated and the duplicates are being pulled apart by fibers of the cell skeleton known as microtubules (green). Studies of cell division yield knowledge that is critical to advancing understanding of many human diseases, including cancer and birth defects.
Image courtesy of Nasser Rusan, National Heart, Lung, and Blood Institute, National Institutes of Health. Part of the exhibit Life:Magnified by ASCB and NIGMS.