ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Bloodstream. Computer artwork of the bloodstream containing red blood cells (red), insulin molecules (yellow) and sugars (white). Red blood cells (erythrocytes) transport oxygen from the lungs to tissues throughout the body. Insulin is a hormone released by the pancreas which stimulates the uptake of sugars by cells in the body.
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