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Transcript
The heart is a cardiac muscle. It is made up of two pumps that continuously pump blood through the body. One pump controls the flow of blood from the heart to the lungs, where carbon dioxide waste is exchanged for fresh oxygen. (body to lungs) The other pump sends the oxygenated blood to all the cells in the body. (lungs to body) EKG (Electrocardiograph) is the machine that measures the pumping of the heart. Each pump has two chambers (sections) called the atrium and the ventricle. There are 4 chambers in the heart: Right Atrium Left Atrium Right Ventricle Left Ventricle The right and left side of the heart is divided down the middle by a wall called the septum. A valve is like a one-way door because it allows the blood to flow through the heart in only one direction. There are 4 valves in the heart: triscuspid valve bicuspid/mitral valve pulmonary valve aortic valve Two main veins in the heart are the vena cava The main artery in the heart is the aorta *Pulmonary vein – carries oxygenated blood away from lungs to heart *Pulmonary artery – carries oxygen poor blood from heart to lungs High Blood Pressure (hypertension)– when blood pressure is higher than the normal pressure; blood vessels become narrow; makes the heart beat faster Stroke – sudden interruption of blood to the brain; the blood vessels in the brain are blocked or burst *Both can be prevented from eating the right foods, exercising and having regular doctor checkups/ Also, not taking any harmful drugs, no smoking 1st Pump (Body to Lungs) From Body Blood enters Heart through the: Vena Cava Right Atrium Tricuspid Valve Right Ventricle Pulmonary Valve Pulmonary Artery Lungs 2nd Pump (Lungs to Body) From Lungs blood reenters through Pulmonary Vein Left Atrium Bicuspid Valve Left Ventricle Aortic Valve Aorta To the Body