CARDIO

• The heart pumps 7,000 liters of blood through the body each day
• The heart contracts 2.5 billion times in an average lifetime
• The heart and all blood vessels make up the cardiovascular system
• Blood vessel circuits


  • Pulmonary circuit
  • Systemic circuit
• Pulmonary circuit


  • Eliminates carbon dioxide via the lungs and oxygenates the blood
  • Oxygenated blood returns to heart via pulmonary veins
  • Deoxygenated blood pumped to lungs via pulmonary arteries
• Systemic circuit


  • Delivers oxygen to all body cells and carries away wastes
  • Oxygenated blood pumped to all body tissues via aorta
  • Deoxygenated blood returns to heart via venae cavae
• Heart

  A hollow, cone-shaped, muscular pump
• Coverings of the heart

  • Pericardium
• Coronary arteries


  Supply blood to the tissues of the heart
• Cardiac cycle


  Pressure in the heart chambers rise and fall
• Heart sounds


  A heart beat through a stethoscope sounds like "lubb-dupp"
• Murmur


  Abnormal heart sound from the cusps not completely closing
• Electrocardiogram (ECG)


  A recording of electrical changes that occur in the myocardium during the cardiac cycle
• Capillaries


  The smallest diameter blood vessels
• Veins


  • Carry blood under relatively low pressure
  • Function as blood reservoirs
• Blood pressure


  The force the blood exerts
• Major components of the cardiovascular system


  • Heart
  • Blood vessels
  • Blood
• Blood


  A liquid organ
• Arteries


  Carry blood away from the ventricles of the heart
• Atria


  Blood pulling
• Arterioles


  Receive blood from the arteries and carry
• Heart


  Strongest set of muscle in the body
• Superior vena cava


  Accepts blood
• Left pulmonary artery


  Carries dirty blood or deoxygenated blood
• Aorta


  Largest artery in the body
• Chordae tendineae


  Can be torn from too much crying and too much emotion