Skip to main content
Framed Pictures, Canvas Prints
Posters & Jigsaws since 2004
Home > All Images > 1991 > January > 16 Jan 1991

Images Dated 16th January 1991

Choose from 12 pictures in our Images Dated 16th January 1991 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

F/col TEM Unactivated blood platelets Featured 16 Jan 1991 Print

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