Fat cells. Coloured scanning electron micrograph (SEM) of adipocytes (fat cells, green) from bone marrow tissue. Surrounding the adipocytes are granulocytes (blue), a type of white blood cell. Adipocytes store energy as an insulating layer of fat and the majority of the cell's volume is taken up by a large lipid droplet. Magnification: x500 when printed at 10 centimetres tall.
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