American Red Cross Coloring Pages

Leukocytes (white blood cells) help fight off foreign substances such as bacteria, viruses, and abnormal cells. In fact, these foreign leukocytes in transfused red blood cells and platelets are often not well tolerated and have been associated with some types of transfusion complications. Leukocytes in stored blood products can have a variety of biological effects, […]

a b c d e f g h i j k l m n o p q r s t u v w x y z