BSIP LAURENT / SCIENCE PHOTO LIBRARY BSIP LAURENT / SCIENCE PHOTO LIBRARY
Blood cholesterol check. Nurse takes a sample of blood for analysis of its cholesterol level. She is using a syringe containing a vacutainer, a small test tube which sucks in blood once a vein is punctured by the needle. Cholesterol is a type of fatty acid found naturally in the blood. High levels of it are implicated in causing atherosclerosis, a condition in which the arteries become clogged with fatty plaques. This can lead to heart disease, heart attacks and strokes. High cholesterol levels are associated with a diet rich in saturated fats, and obesity. The simplest way of reducing cholesterol levels is a change in lifestyle.
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