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Cardiovascular Unit Outline DAY 1 (12.05) Source: Fitness for Life, Corbin Physiology of the cardiovascular / respiratory system: The Cardiovascular system is comprised of the following main components: heart, blood vessels, blood. The respiratory system is comprised of the following main components: lungs, air passageways, and oxygen from outside the body. Both systems work together to bring your body cells the materials they need to function. DAY 2 (12.06) Source: Fitness for Life, Corbin & Physiology of Sport and Exercise, Wilmore and Costill Cardiovascular system organs: Heart: o o o o o o The heart is the size of a fist and is located in the middle of the chest cavity The heart acts as a pump to supply oxygenated blood to the cells of your body Because the heart is a muscle, it benefits from cardio vascular exercise Vigorous physical exercise strengthens the muscles of the heart 2 atria chambers act as receiving chambers from veins 2 ventricles act as sending units to the blood vessels DAY 3 (12.07) Source: Fitness for Life, Corbin & Physiology of Sport and Exercise, Wilmore and Costill Cardiovascular system organs (cont): Blood Vessels: o Carry blood away from the heart o Blocked vessels can lead to atherosclerosis (build-up inside the arteries blocking blood) Veins: o Carry blood to the heart o One-way valves in veins keep the blood from flowing backwards o Lack of exercise can cause valves to stop working properly DAY 4 (12.10) Source: Physiology of Sport and Exercise, Costill, Kenny, & Wilmore Information regarding cardiac functions: Cardiac Output: o The total volume of blood pumped in 1 minute o The average adult body contains 5 Liters of blood o The total amount of blood in the body in cycled through the heart every minute. Stroke Volume: o The volume of blood pumped per stroke (pump) o An increase in heart rate and stroke volume increase cardiac output, therefore, more blood is forced out of the heart during exercise than when at rest, and the circulation speeds up. This allows for oxygen to reach muscles and organs. DAY 5 (12.11) Source: Physiology of Sport and Exercise, Costill, Kenny, & Wilmore Heart rate during exercise measured by heart rate monitors During exercise, cardiac output increases primarily to match the need for increased oxygen supply to the working muscles Healthy heart: o More blood per pump is pushed out of the heart (high stroke volume) o Low resting HR o Typically more physically fit Unhealthy heart: o More pumps with less blood each pump (low stroke volume) o High resting HR o Typically less fit DAY 6 (12.12) Late / Start First Class TEST