structure of the heart

• Heart Diagram:

  A) pulmonary artery

  B) aorta

  C) pulmonary vein

  D) left atrium

  E) heart valve

  F) vena cava

  G) right atrium

  H) tendons

  I) right ventricle

  J) left ventricle

  
• pulmonary vein - connected to the left atrium and brings oxygenated blood back from the lungs
• Vena Cava - connected to the right atrium and brings deoxygenated blood back from the tissues of the body
• the atrium is where the blood first enters from the veins on each side
• Atrioventricular valves - found between the atrium and the ventricle, allow pressure to build in the ventricles as they shut when when ventricular pressure exceeds atrial pressure
• ventricles - pump blood out of the heart into the arteries
• semilunar valves - found in the aorta and pulmonary artery, close when the pressure in the vessels exceeds that in the ventricle
• pulmonary artery - connected to the right ventricle carrying deoxygenated blood to the lungs where its oxygen is replenished
• aorta - an artery that is connected to the left ventricle and carries oxygenated blood to all parts of the body except the lungs
• the pulmonary vein is the only vein to carry oxygenated blood
• the heart muscles receive oxygen through coronary arteries which branch off the aorta