narrowing of arteries. The regulatory centers of cardiac and vasomotor controls the sympathetic neuron to increase the blood pressure with regard to increase in blood volume. These regulating centers are located in the medulla oblongata show vasoconstriction while increasing heart rate. When the heart beat increases the amount of blood entering the arteries increases therefore the constriction of blood vessels takes place. The pressoreceptors in located in the aorta and carotid arteries send impulses
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disease in our arteries can begin as early as our teenage years. Often a body ’s resistance to insulin‚ which is a natural hormone produced by the pancreas‚ leads to Type 2 diabetes and disease in your blood vessels.
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hypertension‚ and what you can do to lower your blood pressure. Hypertension is a chronic medical condition where the pressure of blood in the arteries is elevated. Blood pressure is a measure of the force that blood pumps against the walls of the arteries‚ and will have two readings: the systolic pressure or the measure of the blood within the artery when the heart muscle is contracting‚ and the diastolic pressure or the pressure of the blood when the heart muscle is relaxing. It is read as systolic
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coronary arteries. The vessels that remove the deoxygenated blood from the heart muscle are known as cardiac veins. Anatomical organization The coronary circulation starts at the beginning of the aorta; here we find two arteries in the right and the left side! right and left coronary arteries.
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The human heart pumps blood through veins‚ arteries‚ and capillaries all the time in order to stay alive. A heart attack occurs when cells in the heart cannot receive enough oxygen because not enough blood is being circulated. The more time that passes without proper treatment in order to restore the flow of blood‚ the greater the risk a person has of damaging their heart and of dying. Atherosclerosis is the hardening and narrowing of the arteries and it is usually the cause of heart attacks
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Give an account of how a poor diet and obesity can increase the chance of a person developing Coronary Heart Disease (CHD) A good diet consists of consuming a full range of all the various nutrients needed for proper function of the body and bodily systems. When someone consumes the correct nutrients in the correct proportions‚ they are considered to have a “Balanced Diet”. However‚ when someone is not consuming the correct nutrients or not consuming the correct amount of nutrients they are
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Microorganisms: * Small living organisms; there are 3 types * Bacteria – ecoli‚ salmonella * Fungi – mushrooms‚ athletes foot * Virus – influenza (flu)‚ HIV * When they enter our body‚ they multiply and release toxins / harmful chemicals into our blood * They duplicate every 20 minutes * Physical barriers: eyelashes prevent MO’s from entering through our eyes‚ nasal hairs reduce them‚ skin is a barrier to them (although they can enter through cuts)‚ chemicals in tears
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high blood pressure. Blood pressure is a measurement of the force against the walls of your arteries as your heart pumps blood through your body. Blood pressure is usually read 120/80. The top number is called the systolic blood pressure‚ which is the force of blood in the arteries as the heart beats‚ and the bottom number is called the diastolic blood pressure which is the force of blood in the arteries as the heart
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deprived of oxygen rich blood. Angina isn’t a disease‚ it is a symptom of an under lying heart problem. People usually get angina when they are diagnosed with coronary heart disease. This is when plaque builds up on the walls of the coronary artery. You need these arteries open to supply the heart with oxygen rich blood. There are three types of angina. There is stable‚ unstable‚ variant‚ and microvascular angina. Stable angina is the most common type‚ it occurs when a heart is working harder than usual
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Blood pressure is the measure of the pressure against the walls of the arteries. There are two forces that form blood pressure. One of the forces is created when the heart pumps blood into the arteries through the circulatory system. The other force is due to the arteries as they resist the flow of blood. Blood pressure is always stated in two numbers‚ systolic pressure and diastolic pressure. The higher number is systolic pressure which represents the pressure while heart contracts to pump the blood
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