STEFANIE REICHELT / SCIENCE PHOTO LIBRARY STEFANIE REICHELT / SCIENCE PHOTO LIBRARY
Zebrafish notochord. Confocal light micrograph showing an axial optical section through a zebrafish (Danio rerio) larva. The specimen has been treated with fluorescent stains. The gut (black circle) and notochord (embryonic precursor to backbone, yellow, lower centre) are seen. A confocal microscope detects light only from the focal point of its objective lens. By scanning with the focus of the microscope, an image of a thin slice of an intact specimen can be built up. Magnification: x200 at 6x7cm size.
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