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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / NIBSC |
Bildgröße: | 3414 px × 3483 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |