The heart

• What type of circulatory system does the heart have?

  Double circulatory system
• What is the primary function of blood?

  To pump blood throughout the body
• What does the circulatory system transport to cells?

  Waste substances like glucose and oxygen
• What is the role of pulmonary circulation?

  To send deoxygenated blood to the lungs
• What is systematic circulation responsible for?

  Oxygenating blood for body cells
• How many chambers does the heart have?

  Four chambers
• What are the names of the heart's chambers?

  Two atria and two ventricles
• What is the function of the atria?

  To collect blood and empty into ventricles
• What do the ventricles do?

  Contract and pump blood to the body
• Why is the left ventricle thicker than the right ventricle?

  It pumps blood to the entire body
• Why are ventricles thicker than atria?

  Ventricles pump blood, atria only collect
• What is the purpose of heart valves?

  To prevent backflow of blood
• What causes a valve to open?

  Higher pressure behind the valve
• What causes a valve to close?

  Lower pressure behind the valve