Human heart

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Human heart

  1. 1. Human Heart
  2. 3. Human Heart <ul><li>Human heart has four chambers - two atria and two ventricles. </li></ul><ul><li>The right side of the heart is completely separated from the left side. </li></ul>
  3. 4. Human Heart <ul><li>The right side of the heart receives blood from the body and pumps it to the lungs. </li></ul><ul><li>Left side of the heart receives blood from the lungs and pumps it to the body. </li></ul>
  4. 5. Heart Muscles <ul><li>Heart is made up of cardiac muscles. </li></ul><ul><li>Cardiac muscles can carry on contracting regularly without resting or getting fatigued. </li></ul>
  5. 6. Vena Cava <ul><li>The inferior and superior vena cava collect deoxygenated blood from the tissues and carry it to heart. </li></ul>
  6. 7. Inferior Vena Cava <ul><li>Collects blood from lower parts of the body and delivers it to the right atrium </li></ul>
  7. 8. Superior Vena Cava <ul><li>Collects blood from the upper part of the body and delivers it to the right atrium </li></ul>
  8. 9. Right Atrium <ul><li>Receives blood from the vena cavae. </li></ul><ul><li>The blood is pumped into the ventricles when the atria contracts. </li></ul>
  9. 10. Tricuspid valve <ul><li>This atrio-ventricular valve separates the right atrium from the right ventricle. </li></ul><ul><li>The valve is made up of three flaps. </li></ul><ul><li>Tough tendinous cords (also called heart strings) are attached to the valves and the walls of the ventricle. </li></ul><ul><li>These heart strings allow the valves to open only in one direction. </li></ul>
  10. 11. Right ventricle <ul><li>The right ventricle receives deoxygenated blood from the right atrium. </li></ul><ul><li>Blood is pumped into the pulmonary arteries as the ventricles contract. </li></ul><ul><li>Semi lunar valves present at the base of the pulmonary artery prevent backflow of blood. </li></ul>
  11. 12. Pulmonary veins <ul><li>The blood is carried back to the heart from lungs by pulmonary veins. </li></ul>
  12. 13. Left atrium <ul><li>Oxygenated blood from the lungs is collected by the left atrium. </li></ul><ul><li>It opens into the left ventricle. </li></ul>
  13. 14. Bicuspid valve (Mitral Valve) <ul><li>Protects the opening between left atrium and left ventricle. </li></ul><ul><li>The valve is made up of two flaps. </li></ul>
  14. 15. Left Ventricle <ul><li>Collects oxygenated blood from left atrium. </li></ul><ul><li>When the left ventricle contracts, blood is pumped into the aorta. </li></ul><ul><li>The muscular walls of the left side is much thicker than that of the right. </li></ul>
  15. 16. Aorta <ul><li>This is the largest artery in the body. </li></ul><ul><li>It carries oxygenated blood from the left ventricle to all parts of the body. </li></ul><ul><li>Semi lunar valves present at the base of the aorta prevents the backflow of blood. </li></ul>

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