Blood vessels in the retina showing the endothelial cells in red and the vascular contents in green. Surrounding cell nuclei are stained blue.

    • Freya Mowat

    Licence: Attribution 4.0 International (CC BY 4.0)

    Credit: Blood vessels in the retina showing the endothelial cells in red and the vascular contents in green. Surrounding cell nuclei are stained blue. Freya Mowat. Source: Wellcome Collection.

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