53.3 MB (5.1 MB compressed)
4567 x 4083 pixels
38.6 x 34.5 cm ⏐ 15.2 x 13.6 in (300dpi)
JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Process of osteoporosis. Illustration of an osteo- clast bone cell in action during removal of bone tissue. An osteoclast (blue, centre) is a giant multi-nucleated cell that normally breaks down the calcified matrix of bone (yellow) during bone growth and formation. In the disease of osteo- porosis, however, more of these cells form. Cells which would normally become osteoblast bone growth cells (pink) coalesce to produce osteoclasts. As a result, bones become brittle and less dense, with a greater risk of fractures. Osteoporosis is most common in post-menopausal women, attributed to a decline in ovarian hormone which helps maintain bone mass. Steroid treatment is effective.
Model release not required. Property release not required.