Rheumatoid arthritis mechanism. Artwork showing various aspects of rheumatoid arthritis, the inflammation of the joints due to attack by the body's own immune system. At left, two sets of cellular mechanisms are shown, including B-cells (green), a plasma cell (brown), a macrophage (green, with protrusions), an osteoclast (orange) and a T-cell (blue), as well as various proteins and antibodies involved in the process. The cutaway artwork to the left of the hand shows the anatomy of a single knuckle joint, including the synovial membrane (red). The hand (far right) has the bone and joint anatomy superimposed on it, and shows swelling around the knuckles caused by the cellular processes outlined at left.
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
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