helps carry oxygen from your lungs to your tissues, muscles, and organs. Your hemoglobin levels can increase with increased cardiovascular fitness. This can in turn lead to more effective delivery of oxygen to your body. Arteries, veins, and capillaries are the vessels that carry the blood to all parts of your body. Arteries carry blood away from the heart and veins carry blood back to the heart. Capillaries are tiny vessels that actually carry the blood to each cell of the body. The veins of the circulatory system have one-way valves in them that help keep the blood moving back to the heart. Slide 7 – Blood pressure is defined as the force of the blood against the walls of the arteries. Blood pressure is measured in two parts. Systolic pressure is the pressure against the arteries when your heart contracts. Diastolic pressure is the pressure against the arteries when your heart is relaxed. When someone takes your blood pressure it is recorded by two numbers, such as 120 over 80. A nurse would write that reading as 120/80, this range is considered normal blood pressure. Hypertension or high blood pressure should be monitored on a regular basis. It is always important to have a physical exam and have your blood pressure checked before beginning a new physical fitness program. Slide 8 – Cardiovascular diseases are still the leading cause of death in the United States. These diseases include heart attacks, strokes, hypertension, and atherosclerosis. Many of these diseases are preventable. From the information
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- Spring '16