Early clot formation. Coloured transmission electron micrograph (TEM) of a section through an arteriole containing large numbers of platelets. Platelets plug defects in the walls of blood vessels, and are involved in clotting. They also release serotonin which constricts blood vessels. Platelet cells (thrombocytes) are formed in the bone marrow, and circulate in blood in large numbers. In an inactivated state they are round/oval, whereas activated platelets develop pseudopodia or extensions from the cell wall. Platelets contain cytoplasmic organelles such as mitochondria, endoplasmic reticulum and granules. Magnification: x3000 when printed 10cm wide. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 4178 px × 4572 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |