Heart

    Cards (23)

    • What is the role of the circulatory system?
      To transport oxygen and nutrients to the body's tissues
    • What are the three main components of the circulatory system?
      Blood, blood vessels, and the heart
    • How does the heart function in the circulatory system?
      The heart pumps blood to keep it moving through the vessels
    • What is the structure of the circulatory system?
      • Composed of blood, blood vessels, and the heart
      • Blood carries oxygen and nutrients
      • Blood vessels hold blood
      • Heart pumps blood
    • What is meant by a double circulatory system?
      It has two distinct loops for blood circulation
    • What are the two loops in the double circulatory system?
      One carries deoxygenated blood to the lungs, and the other carries oxygenated blood to the body
    • What happens to blood in the lungs?
      It gains oxygen and becomes oxygenated
    • How many chambers does the heart have?
      Four chambers
    • What are the top chambers of the heart called?
      Atria
    • What are the bottom chambers of the heart called?
      Ventricles
    • What is the function of the valves in the heart?
      To prevent blood from flowing backwards
    • Describe the path blood takes through the heart.
      1. Blood enters via the vena cava and pulmonary vein
      2. Flows into the right atrium and left atrium
      3. Atria contract, pushing blood into ventricles
      4. Ventricles contract, pushing blood into pulmonary artery and aorta
      5. Cycle repeats
    • How often does the heart cycle repeat?
      About 70 times a minute
    • What is the role of pacemaker cells in the heart?
      They produce electrical impulses to regulate heart contractions
    • What is an artificial pacemaker used for?
      To regulate heart contractions when natural pacemaker cells fail
    • What distinguishes arteries from veins?
      Arteries carry blood away from the heart, while veins carry blood to the heart
    • Can arteries carry deoxygenated blood?
      Yes, the pulmonary artery carries deoxygenated blood
    • Can veins carry oxygenated blood?
      Yes, the pulmonary vein carries oxygenated blood
    • What are coronary arteries?
      Small arteries that supply oxygenated blood to the heart muscle
    • What is the importance of coronary arteries?
      • Supply oxygen and nutrients to heart muscle
      • Ensure proper heart function
      • Prevent heart tissue damage
    • What type of walls surround the chambers of the heart?
      Thick muscular walls
    • How is the orientation of the heart represented in diagrams?
      The left side is on our right and the right side is on our left
    • Why does the heart need its own supply of oxygenated blood?
      To ensure the muscle tissue gets all the oxygen and nutrients it needs
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