STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Ovarian cancer. Coloured scanning electron micrograph (SEM) of bone tissue from a teratoma tumour. Teratomas are malignant (cancerous) tumours that arise from the germ (sex) cells. Because germ cells are pluripotent, that is they can differentiate into any cell type, tumours contain a mixture of tissues. Bone, hair and teeth may form in the tumour. At centre is an osteoclast (red), a type of bone cell that degrades and reabsorbs bone tissue. Magnification: x5000 when printed at 10 centimetres wide.
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