the heart

• label

  A) left ventricle

  B) right ventricle

  C) right atrium

  D) left atrium

  E) aorta

  F) pulmonary vein

  G) pulmonary artery

  H) vena cava

  I) tricuspid valve

  J) bicuspid valve

  K) papillary muscle

  L) valve tendon

  M) semi-lunar valve

  
• valves

  prevent back flow of blood
• tricuspid valve

  between right atrium-ventricle
• bicuspid valve

  between left atrium-ventricle
• semilunar valves

  half-moon shaped valves in aorta and pulmonary arteries
• coronary vessels

  responsible for gas/nutrients/waste exchange in the cardiac muscle
• pulmonary veins

  one from each lung converging into left atrium
• pulmonary artery

  from the right ventricle to the lungs
• aorta artery

  oxygenated blood at high pressure from left ventricle to lungs
• vena cava

  from head/upper body and one from the lower body to right atrium
• hole in heart

  • congenital- between atria or ventricles
  • allow mixing of oxygenated and deoxygenated blood
  • some blood does not enter ventricles and pulmonary artery
  • reduces systolic pressure

  If not treated-

  • pressure reduces
  • less O2 carried = less respiration = less O2 to cells = aneamia
• What are the major vessels associated with the heart that contain deoxygenated blood?

  Superior and inferior vena cavae
• What are the major vessels associated with the heart that contain oxygenated blood?

  Pulmonary veins and aorta
• What is the name of the chamber of the heart with the thickest muscle?

  Left ventricle
• What causes the atrioventricular valves to close?

  Pressure from ventricular contraction
• What causes the semilunar valves to close?

  Decreased pressure in the ventricles
• Where is the SA node located?

  Right atrium
• What is the name of the structure that delays the wave of depolarization from reaching the ventricles?

  Atrioventricular node
• What causes the semilunar valves to open?

  Increased pressure in the ventricles
• What causes the atrioventricular valves to open?

  Decreased pressure in the ventricles
• What are the fibers that extend upward from the base of the ventricles?

  Purkinje fibers
• What is the name of the fibers that extend upward from the base of the ventricles?

  Purkinje fibers