ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY
Blood cells. Computer artwork showing red blood cells (erythrocytes, red), white blood cells (leucocytes, white) and platelets (thrombocytes, yellow). Red blood cells distribute oxygen to body tissues, and carry waste carbon dioxide back to the lungs. White blood cells are part of the immune system. They attack and destroy infectious agents (pathogens) and foreign substances, and destroy and remove cellular debris. Platelets are active in blood coagulation (clotting).
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