Early stage of blood clot formation: false-colour scanning electron micrograph (SEM) showing an aggregation of red blood cells on the endocardium,the lining of the heart. Clotting is a repair process signalled by the release of thromboplastin from platelets (a type of blood cell) and injured endothelial cells. The formation of a clot,a mesh of blood cells bound by threads of fibrin,is a complex multi-step process. No fibrin is visible at this early stage. Red cells sometimes tend to align into columns (rouleaux formation),due to surface tension effects. Magnification: x210 at 6x7cm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / UNIVERSITY LA SAPIENZA, ROME / DEPT. OF ANATOMY / PROF. P. MOTTA |
Taille de l’image : | 3718 px × 2516 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |