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Images Dated 12th September 2000

Choose from 22 pictures in our Images Dated 12th September 2000 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Blood platelets Featured 12 Sep 2000 Image

Blood platelets

Blood platelets. Coloured scanning electron micro- graph (SEM) of activated blood platelets. Platelet cells (thrombocytes) are formed in the bone marrow, and circulate in the bloodstream in large numbers. When unactivated they are round/oval, whereas activated platelets develop pseudopodia or extensions from the cell wall as seen here. Platelets function in two ways: they plug defects in the walls of damaged blood vessels, and they are involved in the clotting of blood. They also release serotonin which constricts blood vessels. Magnification: x3, 300 at 6x6cm size