The Cardiovascular System Of The Heart And Blood Vessels

1668 WordsJan 21, 20167 Pages
[The purpose of the cardiovascular system is to circulate blood throughout the body. The cardiovascular system transports gasses, nutrients, and wastes. Also, the cardiovascular system protects the body against infection, regulates temperature, and helps maintain fluid balance within the body.] [Cardiovascular disease is a range of disorders of the heart and blood vessels. Examples of CVD are an arrhythmia, coronary artery disease, and congenital heart disease.] [Tobacco use increases the risk for CVD because it damages the lining of arteries. Also, it decreases the level of HDL and increases the levels of LDL cholesterol. Nicotine causes an increase in blood pressure and heart rate. Carbon monoxide in cigarette smoke lowers the amount of oxygen the blood can carry. Tobacco smoke increases the tendency of blood platelets to stick together, which might cause a blood clot, and it speeds the development of plaque.] [Blood pressure is measured using two numbers. The first number is the systolic blood pressure, which is a contraction phase of the heart. The second number is the diastolic blood pressure, which is a relaxation phase of the heart. The normal blood pressure reading for a healthy adult is below 120 over 80. The reading that qualifies as high blood pressure is higher than 140 over 90. High blood pressure increases the risk for CVD because too much force is applied against the walls of the arteries, resulting heart to work harder to force blood through the narrowed
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