ROBERT BROCKSMITH / SCIENCE PHOTO LIBRARY ROBERT BROCKSMITH / SCIENCE PHOTO LIBRARY
Fat cell. Computer artwork of an adipocyte (fat cell). The majority of the cell is filled with a lipid droplet. Also seen are the cell's nucleus (orange), which contains its genetic information, mitochondria (red and green), which produce energy, and golgi apparatus (pink), which modify and pack proteins. Adipocytes form adipose tissue, which stores energy as an insulating layer of fat.
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