Atherosclerosis of an artery. Illustration of a cross-section through an artery that has become narrowed due to atherosclerosis. A raised yellow plaqu
Atherosclerosis of an artery. Illustration of a cross-section through an artery that has become narrowed due to atherosclerosis. A raised yellow plaque is seen in the wall of the artery. This plaque (atheroma) is made of lipids (spheres) and decaying muscle cells encasing crystals of calcium (white). Atheroma plaques are found in people who have a high concentration of certain forms of cholesterol in their bloodstream. Narrowing of the arteries increases the risk of blood clots forming, and is associated with coronary heart disease and stroke. The three types of lipids are VLDL (very low-density lipoprotein), HDL (high-density lipoprotein) and LDL (low-density lipoprotein).
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Photo credit: © JOHN BAVOSI/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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