blood cells

False colour scanning electron micrograph of the different cell types found in blood. The two round white cells are leukocytes or white blood cells and are part of the body's immune response and will be the first cells to the site of infection. The red blood cells or erythrocytes (shown in red) are the main blood cell type they contain heamoglobin, and are responsible for transporting Oxygen round the body. The smaller green cell in the bottom of the image is a platelet and is important in the formation of blood clots. Also important for blood clots is the protien Fibrin, which form long strands (shown in brown) and act as a protective 'mesh' over the site of injury. blood cells are from a human blood sample as a result of a cut finger.