ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY
Red blood cells. Computer artwork of red blood cells (erythrocytes) in the bloodstream. These cells are responsible for carrying oxygen around the body. They carry oxygen using the protein complex haemoglobin. The haemoglobin gives the cells their red colour. The red blood cells pick up oxygen in the lungs. They release it in areas of the body low in oxygen, and take up carbon dioxide, the waste product of cell metabolism. The carbon dioxide is then carried to the lungs where it is released and exhaled.
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