force per unit area exerted on a vessel wall by the contained blood in the heart‚ and is measured by millimeters of mercury (mm Hg) (Marieb‚ 703). Each time the heart beats (which is about 60-70 times a minute at rest); it pumps out blood into the arteries. There are two types of pressure recorded that can determine your blood pressure. Your blood pressure is at its highest when the heart beats‚ pumping the blood. This is called systolic pressure. When the heart is at rest‚ between beats‚ your
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Ashraf Barrada Chemistry –EH March 16th‚ 2013 Smoking Have you ever thought about what smoking does to you and the people around you? Have you ever thought of why it isn’t legal for you to smoke it at a certain age and isn’t a tolerated action? Once there was a young boy‚ who smoked when he was young and he grew up smoking a pack of cigarettes every day. Now that guy lives on hospital machines and asthma inhalers because the cigarettes have caused him to have lung failure and cancer. It has
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of the artery walls from too much pressure. Atherosclerosis can lead to arteriosclerosis‚ which comes from the Greek for “hardening of the arteries.” The most common sites for arteriosclerosis are arteries in the brain‚ kidneys‚ heart‚ abdominal aorta‚ or legs. Symptoms of arteriosclerosis vary according to which arteries are affected. Leg pain when exercising might indicate peripheral arterial disease. Sudden weakness or dizziness could be caused by an obstruction in the carotid artery in the neck
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system. This is something that happens when the blood supply to your heart is blocked or interrupted by a build-up of fatty substances in the arteries Coronary heart disease is the term that describes what happens when your heart’s blood supply is blocked or interrupted by a build-up of fatty substances in the coronary arteries Over time‚ the walls of your arteries can become furred up with fatty deposits. This process is known as atherosclerosis and the fatty deposits are called atheroma Your risk
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Blood Pressure Anatomy And Physiology Breven Sellers 11/3/2014 Arteries • Arteries are thick walled‚ yet they are elastic enough to stand pressure from the heart pumping at a fast rate. The arteries job is to transport blood away from the heart‚ usually only transporting highly oxygenated blood‚ having just left the lungs and on its way to the body’s tissues Arterioles • There are smaller branches of the arteries called arterioles‚ they connect to the capillaries. • Arterioles are the main
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MYOCARDIAL INFARCTION Mechanisms of Occlusion Most MIs are caused by a disruption in the vascular endothelium associated with an unstable atherosclerotic plaque that stimulates the formation of an intracoronary thrombus‚ which results in coronary artery blood flow occlusion. If such an occlusion persists long enough (20 to 40 min)‚ irreversible myocardial cell damage and cell death will occur.5 The development of atherosclerotic plaque occurs over a period of years to decades. The initial vascular
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lung diseases. The chemicals in tobacco damage your blood cells. Also‚ they damage the function of heart. This one increases the risk of atherosclerosis that is a disease in which a substance called plaque builds up in heart arteries. The plaques harden and narrow arteries so this limits the flow of oxygen-blood the heart. By this reason‚ every smoker suffer from chest pain‚ heart attack‚ heart arrhythmias‚ or even death. Lungs are the most directly affected by smoking. They are designed to provide
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Anatomy Finals’ Notes Blood Vessels and Hemodynamics Arteries‚ Capillaries and Veins arteries --> arterioles --> capillaries --> venules --> veins Arteries = away from heart Veins = toward heart Only capillaries directly serve cells Tunica Intima = inside of blood vessel. Single layer of cells similar to the lining of the heart Tunica Media = middle layer. Smooth muscle...regulates diameter of vessels Tunica Adventitia (externa) = outer layer. Collagen
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through the blood stream. Blood pressure is the force of the blood pushing on the walls of the veins and arteries as blood is pumped through the bloodstream each time the ventricles contract. The hypothesis is that the heart rate will increase significantly after exercise. Methods: First the resting heart rates of six subjects were determined by placing two fingers on the carotid artery in the neck and counting the heart beats for fifteen seconds. The number of beats was then multiplied by
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builds up in the lungs causing pulmonary congestion. The backup of fluid causes the body to not get enough blood‚ food and/or oxygen. Heart failure is cause by many things‚ but the most common is coronary artery disease (CAD). CAD occurs when fatty deposits called plaque buildup in the arteries that supply blood to the heart muscle. Other risk factors include past heart attacks‚ heart defects from birth‚ high blood pressure‚ heart valve disease‚ diseases of the heart muscle‚ heart infection‚ arrhythmias
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