Red blood cells contain the protein hemoglobin which provides for the oxygen transport in the body. Here the erythrocytes can be seen in a opened blood clot. Fibrinogen, a substance in the blood plasma, forms long chains under the influence of thrombin and thus acts as a "glue" for wound closure, ensuring hemostasis.
Scanning electron microscope, magnification 14 000: 1
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© Oliver Meckes