How+the+Heart+Works+KR

media type="file" key="HeartKr.mov" =How our Hearts Works=

Heart Research

 * The heart has four chambers. The upper two chambers are the right atrium and left atrium, and the lower two are the right ventricle and left ventricle
 * Blood is pumped through the chambers, aided by four heart valves. The valves open and close to let the blood flow in only one direction.
 * The four heart valves are
 * he tricuspid valve, located between the right atrium and the right ventricle
 * the pulmonary valve, between the right ventricle and the pulmonary artery
 * the mitral valve, between the left atrium and left ventricle
 * the aortic valve, between the left ventricle and the aorta
 * blood enters the right side of the heart through two veins: The superior vena cava and the inferior vena cava
 * Blood then flows
 * to the superior and inferior vena cava,
 * then to the right atrium
 * through the tricuspid valve
 * to the right ventricle
 * through the pulmonic valve
 * to the pulmonary artery
 * to the lungs



Script

 * 1) Hi this Keaton Rye again and today i will be talking about how the heart works. The heart has 4 separate chambers that each do unique jobs of their own.....
 * 2) The blood enters the heart through the
 * 3) Each chamber has a sort of one-way valve at its exit that prevents blood from flowing backwards. When each chamber contracts, the valve at its exit opens. When it is finished contracting, the valve closes so that blood does not flow backwards.
 * 4) Talk about how the what happens once the heart is done pumping blood
 * 5) Random Facts about the heart.