Circulation

• What is one of the functions of the circulatory system in humans?

  To transport substances
• What is the importance of transport systems in multicellular organisms?

  • Supply cells with essential substances
  • Remove waste products from cells
• What is the main muscular organ that pumps blood around the body?

  The heart
• What is the main artery that carries oxygenated blood from the heart in mammals?

  The aorta
• What type of blood vessel transports blood to the heart?

  Veins
• How do valves in the heart contribute to blood flow?

  They ensure one-way flow of blood
• What happens when a heart valve closes?

  It prevents backflow of blood
• What can happen if heart valves become faulty?

  They may not open or close properly
• What are the potential symptoms of faulty heart valves?

  Shortness of breath, dizziness, rapid heart rate, and chest pain
• How can a faulty heart valve be diagnosed?

  Through a scan of the heart
• What condition can result from severe faulty heart valves?

  Heart failure
• What are the two types of valves that can replace faulty heart valves?

  Biological valves and mechanical valves
• What is a potential drawback of mechanical valves?

  Blood can clot on them
• What is a potential drawback of biological valves?

  They are more likely to wear out
• What are the treatment options for faulty heart valves?

  • Replacement with biological valves (human donor or animal tissue)
  • Replacement with mechanical valves (strong, durable materials)
  • Surgery may be required for severe cases
• Who is Dr. Alex Lathbridge?

  A person who discusses the circulatory system in a podcast
• What is the purpose of the podcast mentioned in the study material?

  To provide information about the circulatory system
• What is the function of the aorta?

  To carry oxygenated blood from the heart
• What is the role of the heart in the circulatory system?

  To pump blood around the body
• What is the role of veins in the circulatory system?

  To transport blood to the heart
• What is the significance of one-way blood flow in the circulatory system?

  It prevents backflow and ensures efficient circulation
• How does a faulty heart valve affect blood flow?

  It restricts blood flow or allows backflow
• What are the potential consequences of untreated faulty heart valves?

  They can lead to heart failure
• What is the primary function of the circulatory system?

  To transport substances throughout the body