cardio

• Heart


  • Hollow, muscular organ
  • Weighs approximately 300 grams
  • Composed of 3 layers: Endocardium (inner), Myocardium (middle, responsible for pumping), Epicardium (outer layer)
  • Encased in a thin fibrous sac called pericardium
  • Filled with about 20 ml fluid for lubrication
• Heart chambers


  • Atrium (receiving chamber)
  • Ventricle (pumping chamber)
• Heart valves


  • Tricuspid, Mitral
  • Pulmonic, Aortic
  • Prevents reflux or backflow of the blood

  
• Artery


  Carries oxygenated blood
• Vein


  Carries deoxygenated blood
• Pulmonary artery


  Only vein that carries unoxygenated blood
• Aortic Vein


  Only vein that carries oxygenated blood