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THE HEART RECAP What are the major functions of the circulatory system? What are the major parts of the circulatory system? What is the function of the heart? aorta superior vena cava pulmonary artery right atrium left atrium right ventricle left ventricle inferior vena cava septum OXYGENATED OR DEOXYGENATED? Blood passing through the aorta Blood entering the right atrium Blood entering the left ventricle Blood passing through the pulmonary vein Blood passing through the inferior vena cava Blood entering the right ventricle Blood passing through the pulmonary artery Blood entering the left atrium PULMONARY CIRCULATION Exchange of oxygen and carbon dioxide takes place. Blood is pushed into the pulmonary arteries and into the left and right lungs. Deoxygenated blood flows into the right ventricle of the heart. Deoxygenated blood enters the right atrium of the heart. Oxygenated blood from the lungs flows to the left atrium of the heart. PULMONARY CIRCULATION Deoxygenated blood enters the right atrium of the heart. Deoxygenated blood flows into the right ventricle of the heart. Blood is pushed into the pulmonary arteries and into the left and right lungs. Exchange of oxygen and carbon dioxide takes place. Oxygenated blood from the lungs flows to the left atrium of the heart. SYSTEMIC CIRCULATION Deoxygenated blood enters into the vena cavae. From the left ventricle, oxygenated blood is pushed to the largest artery known as the aorta. The blood goes back to the heart through the right atrium. Then, the blood is pushed into the right ventricle going to the lungs. Exchange of gases take place as oxygenated blood passes through the different organs. SYSTEMIC CIRCULATION From the left ventricle, oxygenated blood is pushed to the largest artery known as the aorta. Exchange of gases take place as oxygenated blood passes through the different organs. Deoxygenated blood enters into the vena cavae. The blood goes back to the heart through the right atrium. Then, the blood is pushed into the right ventricle going to the lungs. SOUND CHECK! Sound 1 Sound 2 Sound 3 WHAT CAUSES THE BEATING SOUND OF THE HEART? the closing of the valves in the heart “lub” – tricuspid and mitral valve closing “DUB” – pulmonary and aortic valve closing Diastole – relaxation Systole – contraction CAN YOU FEEL YOUR HEARTBEAT? Place your palm on your chest and feel your heartbeat. Count how many times your heart beat in one minute. FOR THE RECORD… newborn baby : 120 – 160 baby aged 1 – 12 mos.: 80 – 140 baby / toddler aged 2 – 6: 75 – 120 child aged 7 – 12: 75 – 110 adult aged 18+ years: 60 – 100 adult athlete: 40 – 60 NAME THAT TOOL! Stethoscope – used to listen to the heartbeat IS THERE ANY OTHER WAY TO DETERMINE OUR HEARTBEAT? Activity 1 next session…