False-colour scanning electron micrograph (SEM) of aggregrates of human blood platelets. Platelets (thrombocytes) are small,non-nucleated cells formed in the bone marrow & are present in circulating blood in large numbers. Their individual shape is round or oval (2-3 micrometres in diameter). Platelets function in 2 ways. Firstly,they help plug small defects in the walls of small blood vessels: secondly,they contribute towards the process of clotting & also release serotonin,which reduces blood flow by constricting the damaged vessels. Magnification: X 4,400 at 35mm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Photo Insolite Realite |
Bildgröße: | 2855 px × 3490 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |