Red Blood Cells And Platelets #5
by Science Photo Library
Title
Red Blood Cells And Platelets #5
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Red blood cells and platelets. Coloured scanning electon micrograph (SEM) of human erythrocytes (red blood cells) and a platelet aggregate (blue). Platelets are fragments of white blood cells that under normal circumstances are small and biconcave in form. However, if there is a break in the surface of a blood vessel the platelets come into contact with molecules they are not used to and become activated. They become amorphous in form, with long projections (pseudopodia) that help them adhere to other cells and each other, forming a clot. Magnification: x4000 when printed at 10 centimetres wide.
Uploaded
July 31st, 2016
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