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Transcript
The Incredible Cardiovascular System How the <3 Works Cardiovascular System = Circulatory System •Made up of: • Heart • Blood • Blood Vessels The Heart • Size of a fist. • Location: Center of the chest (tipped slightly to the left). • One big muscle. • 4 chamber “double pump”. • Normal Heart Rhythm: LUB DUB The Heart Goes On……. • Harder the <3 works the healthier it can become. • Average Heart Rate: 72 Beats Per Min. (BPM) • Range: 60-80 bpm. • Does anyone know how to check their pulse? • People are born with heart defects. (Congenital Heart Defects) • Can damage your heart with lifestyle choices. • What are risk factors for heart disease? Facts of the Heart…. • Pumps 2,000 gallons of blood each day. • Beats 4,000 times each hour; 10,000 times each day; 35 million times in a year!!!!!!!! • Muscle that has both mechanical and electrical components. • If both are NOT working = the body and brain CANNOT function. • Electricity – causes your heart to pump and blood/nutrients to pump to the body. Blood ……… • Plasma – fluid part of blood; mostly water; yellowish, clear color. • Red Blood Cells – carry oxygen and nutrients. • White Blood Cells – fight infection, multiply as needed by the body. • Platelets – clotting factor, gather at wound site. (they form scabs). • Hemoglobin – carries iron in blood, gives blood the RED color. • There are 12 pints of blood in adults. • Live in high altitudes, have 2 more pints than in lower levels. Blood Types Blood Vessels • Cardiovascular system is the network that delivers blood to every part of the body. • If all the blood vessels were lined up end to end, they would stretch over 60,000 miles!!! • 3 types: • Arteries – carry oxygenated blood (rich with nutrients) away from the heart to the body. • Veins – Carry deoxygenated blood back to the heart. • In order for the blood to become oxygenated: each time you inhale oxygen is absorbed by your lungs and transferred into blood. This blood is sent to the heart. • Capillaries – smallest and thinnest of blood vessels. • Carry blood very close to cells of tissues of body to exchange gas, nutrients and waste products. Heart Disease…… • Aka Cardiovascular Disease. • #1 cause of death for Americans • Nearly 84 million American adults have some form of cardiovascular disease. • 2,150 each day. (1 every 40 seconds). • Any condition that negatively affects the heart’s ability to efficiently pump blood or the body’s ability to transport blood. • Ex: Plaque buildup, stiffening of arteries, abnormal heart rhythms, heart failure, heart valve problems, heart attack and stroke. • Preventable Types of Heart Disease •Congenital Heart Defects • Different from Heart Disease • Abnormality present at birth that prevents the heart from working correctly. • Identified early in life. • Can be fixed or treated (Corrective Surgery, Medicine). Heart Attack v. Cardiac Arrest • Heart Attack aka Myocardial Infarction. • Blood flow to the heart is blocked. • “Circulation” problem. • Occurs when blocked artery prevents oxygen-rich blood from reaching a section of the heart. • Death of the heart muscle. • Symptoms: • Vary between men and women • Not everyone experiences chest pain. • Pain or discomfort in one or both arms, back, neck, jaw, abdomen. • Shortness of breath. • Nausea • Cold Sweats • Lightheaded. Cardiac Arrest • The heart malfunctions and suddenly stops beating. (Heart Quivers). • “Electrical” problem. • The electrical malfunction causes irregular heartbeat. • CANNOT pump blood to the brain, lungs, and other organs. • Death can occur within minutes without CPR or AED. *Heart Attack and Cardiac Arrest are linked: SCA can occur after a heart attack or during recovery* CPR and AED • Cardio Pulmonary Resuscitation. • Cardio = of the heart • Pulmonary = of the lungs • Resuscitation = to bring back. • CPR can double, even triple a person’s chance of survival and it’s easy to remember! • AED – sends an electrical shock to the heart to reset it’s normal rhythm. • Automated – talks back to you. • External – Outside of the body • Defibrillator – device that resets the heart.
