False-col SEM of blood cells in a blood capillary

False-col SEM of blood cells in a blood capillary

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Caption: False-colour scanning electron micrograph (SEM) of red blood cells or erythrocytes (seen as the orange biconvave discs) densely packed into a blood capillary. Capillaries are the smallest type of blood vessel, made up exclusively of endothelial cells. Erythrocytes are essentially non-motile bags of haemoglobin; their biconcave shape is an adaptation to increase the surface area over which the exchange of oxygen & carbon dioxide can occur. They are flexible, & can accommodate themselves to the smallest capillaries. Magnification: x600 at 35mm size.

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Keywords: anatomy, blood, capillary, cells, human body, red blood cell

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