Cardiorespiratory system 3º

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<p>UNIT 5: THE HUMAN BODY CARDIORESPIRATORY SYSTEM</p> <p>UNIT 5: THE HUMAN BODY CARDIORESPIRATORY SYSTEMPHYSICAL EDUCATION DEPARTMENTI.E.S. PEALBA3rd ESOINTRODUCTION Cardiorespiratory system is the responsable of the basic physical capacity of endurance. The system is composed by the cardiovascular system and the respiratory system.</p> <p>RESPIRATORY SYSTEM Its main function is the gas exchange between the body and the atmosphere. The respiratory system removes no necessary gases (CO2) and it catches oxygen (O2) from the air needed by cells. </p> <p> BREATHING Breathing is the process of gas exchange between the body and the atmosphere.</p> <p>Breathing process has two phases: ventilation and diffusion.</p> <p>VENTILATIONThis part has two phases.Inhalation: air is sucked from the atmosphere into lungs (alveoli).Exhalation: the process of breathing out CO2 from lungs (alveoli) to atmosphere.</p> <p>DIFFUSIONIs the process of gas exchange (O2 and CO2) between alveoli from the lungs and capillary from the circulatory system through alveoli membranes.</p> <p>RESPIRATORY RESPONSE TO EXERCISE During the physical activity we increase the number of breaths per minute and how deep they are. The volume of air that is inhalated and exhalated increases. </p> <p>Lung Volume: is the volume of air inhalated or exhalated in each breath.Rest: 0,5 litres.Physical Activity: up to 3 litres.Breath Rate: is the number of breathings per minute.Rest is about 16-20 breaths per minute. Physical Activity it increases to 30-50 breaths per minuteLung capacity: is the maximum amount of air that can fill the lungs. Non smoker person is about 3-4 litres Smoker lung capacity is arround 1-1,5 litres.Athlete lung capacity is 7 litres.</p> <p>To breath correctly is very important for physical activity and to delay fatigue. So that is very important to inhalate through the nose and exhalate through the mouth and to keep an uniform respiratory rythm.CARDIOVASCULAR SYSTEM The main function of this system is to transport nutrients and oxygen to organs and muscles and transport waste products (CO2) to the liver, kidneys, and lungs.</p> <p>ANATOMY OF THE HEARTThe human heart is an organ that pumps blood throughout the body via the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes.</p> <p>HEART MOVEMENTSThe Heart has two movements to pump blood: systole (contaction) and diastole (relax).Atrial Systole: atrium contacts to push the blood into the ventricle while ventricle diastole.Ventricles Systole: ventricles contracts to push blood to every cells of the body or lungs while atrium diastole.</p> <p>CARDIOVASCULAR RESPONSE TO EXERCISEPhysical activity increases the cardiovascular system activity because:</p> <p>HEART RATE INCREASES We need to carry more oxygen to muscles:</p> <p>Maximum Heart Rate: 220-age</p> <p>Rest Heart Rate sedentary people 60-90 bpm athletes 40-60 bpm</p> <p>STROKE VOLUME INCREASESStroke Volume is the volume of blood pumped by left ventricle of the heart with each beat=Volumen Sistlico)</p> <p>Rest Stroke Volume: 75 militres.Active Stroke Volume: sedentary people: 140 mililitres. athletes: 190 mililitres.</p> <p>CARDIAC OUTPUT INCREASESCardiac Output is the volume of blood pumped by the heart per minute= Gasto Cardaco</p> <p>Rest Cardiac Output: 5-6 litresActive Cardiac Output: 15-20 litres</p> <p>ALSO INCREASESCoronary Flow : blood that flows to the cardiac muscle, myocardium.</p> <p>The volume of blood that flow to muscles.</p> <p>When we practice exercise the distribution of blood flow in our body change. Rest: 20% of blood flows to musclesPhysical activity: 80% of blood flows to muscle.</p> <p>The only organ that needs the same quantity of oxygen is the Brain</p> <p>THE END</p>