F / col TEM Unactivated blood platelets

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F / col TEM Unactivated blood platelets

False-colour transmission electron micrograph of unactivated blood platelets & some red blood cells (bottom left). Platelets (thrombocytes) are small, non-nucleated cells formed in the bone marrow and found in circulating blood. Unactivated platelets are oval in shape and 2-3 micrometres in diameter. Activated platelets have dendritic processes or pseudopodia. Platelets function in 2 ways; they help plug small defects in the walls of small blood vessels and they are involved in clotting and the release of serotonin, a compound which reduces blood flow by constricting the damaged vessels. Magnification: x12, 000 at 6x7cm size

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6446881

© CNRI/SCIENCE PHOTO LIBRARY PHOTO LIBRARY

Blood Clotting Platelet Platelets Thrombocyte

EDITORS COMMENTS
This print from Science Photo Library showcases the intricate world of blood platelets. In this false-colour transmission electron micrograph, we are presented with a mesmerizing view of unactivated blood platelets and a few red blood cells in the bottom left corner. Platelets, also known as thrombocytes, are tiny non-nucleated cells that originate in the bone marrow and circulate within our bloodstream. The unactivated platelets depicted here exhibit an oval shape and measure between 2-3 micrometres in diameter. However, when activated, they develop dendritic processes or pseudopodia. The significance of these remarkable platelets lies in their dual functionality. Firstly, they play a crucial role in sealing small defects present on the walls of minor blood vessels by forming plugs. Secondly, they contribute to clotting mechanisms while simultaneously releasing serotonin – a compound that constricts damaged vessels and reduces blood flow. At a magnification level of x12,000 for this 6x7cm-sized print, we can truly appreciate the intricacies hidden within our own bodies. This image serves as a reminder of the complexity and beauty found within human anatomy.

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