The Heart and Circulation

• What type of circulatory system do fish have?

  Single circulatory system
• Where does deoxygenated blood go in fish?

  To the gills for oxygenation
• What happens to blood after it collects oxygen in fish?

  It passes to the organs
• What is a disadvantage of a single circulatory system?

  Blood loses pressure before reaching organs
• What type of circulatory system do humans have?

  Double circulatory system
• What is the benefit of a double circulatory system?

  Blood can travel rapidly to body cells
• What are the names of the upper chambers of the heart?

  Left atrium and right atrium
• How many chambers does the human heart have?

  Four chambers
• What are the names of the lower chambers of the heart?

  Left ventricle and right ventricle
• What separates the atria from the ventricles?

  Valves
• What does the vena cava do?

  Brings oxygenated blood from the body