Biology (the heart)

• What is the main function of red blood cells?

  Transport oxygen from lungs
• What is the function of white blood cells?

  Fight off infection
• What are the two types of white blood cells mentioned?

  Phagocytes and lymphocytes
• What is the role of platelets in blood?

  Help clot wounds
• What does plasma carry around the body?

  Different cells
• What does hemoglobin contain that binds to oxygen?

  Iron
• Why do arteries have the thickest walls?

  Carry blood at high pressure
• What type of blood do arteries carry?

  Oxygenated blood
• Why do veins have valves?

  Prevent backflow of blood
• What type of blood do veins carry?

  Deoxygenated blood
• Where are gases exchanged in the body?

  Capillaries
• What are the layers of an artery?

  • Elastic fibres
  • Muscles
  • Fibres
• What is the width of the capillary lumen?

  One cell wide
• What is the flow of blood through the body?

  • Vena cava
  • Right atrium
  • Right ventricle
  • Pulmonary artery
  • Lungs
  • Pulmonary vein
  • Left atrium
  • Left ventricle
  • Aorta
• Which blood vessel carries blood from the right ventricle to the lungs?

  Pulmonary artery
• What is the largest artery in the body?

  Aorta
• Which large vein brings deoxygenated blood to the heart?

  Vena cava