Cardiovascular

• Path of Blood Through the Heart

  • Blood from systemic circuit
  • Venae cavae
  • Right atrium
  • Right ventricle

  Tricuspid valve

  Pulmonary valve

  • Pulmonary trunk
  • Pulmonary arteries
  • Alveolar capillaries (lungs)
  • Pulmonary veins
  • Left atrium
  • Left ventricle

  Mitral valve

  Aortic valve

  • Aorta
  • Blood to systemic circuit
• arteries

  • carry blood away from ventricles of heart
• arterioles

  • receive blood from arteries
  • carry blood to capillaries
• capillaries

  • sites of exchange of substances between blood and body cells
• venules

  • receive blood from capillaries
• veins

  • carry blood toward ventricle of heart
• Artery

  • thick strong wall
  • endothelial lining
  • middle layer of smooth muscle and elastic tissue
  • outer layer of connective tissue
  • carries blood under relatively high pressure
• Arterioles

  • thinner wall than artery
  • endothelial lining
  • some smooth muscle tissue
  • small amount of connective tissue
  • helps control blood flow into a capillary
• Blood Vessels

  arteries

  • carry blood away from ventricles of heart

  arterioles

  • receive blood from arteries
  • carry blood to capillaries

  capillaries

  • sites of exchange of substances between blood and body cells

  venules

  • receive blood from capillaries

  veins

  • carry blood toward ventricle of heart