MICROSCAPE / SCIENCE PHOTO LIBRARY MICROSCAPE / SCIENCE PHOTO LIBRARY
Light microscopy of developing fetal vertebral column. In the fetus, vertebral bodies are formed of cartilage (blue stained) which is gradually replaced by new bone starting in the centre of the cartilage (ossification centres, pink/light blue) and moving outwards. Elliptical-shaped structures, each known as a nucleus pulposus, are the remnants of the embryonic body axis and will form the centres of the intervertebral discs. Magnification x18 when narrow width printed at 10 cm.
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