Circulatory System Quiz
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Questions and Answers

Which layer of the heart is responsible for the rhythmic contraction for pumping?

  • Endocardium
  • Epicardium
  • Myocardium (correct)
  • Subendocardium
  • What are the components of the circulatory system?

  • Heart, arteries, veins, capillaries, lymphatics (correct)
  • Endocardium, subendocardium, purkinje fibers, muscle fibers
  • Atria, ventricles, myocardium, epicardium
  • Endothelium, mesothelium, connective tissue, serous fluid
  • Which layer of the heart is the thickest?

  • Epicardium
  • Subendocardium
  • Endocardium
  • Myocardium (correct)
  • What is the function of the epicardium?

    <p>Prevention of friction as the heart beats</p> Signup and view all the answers

    Where are the Purkinje fibers located?

    <p>Endocardium</p> Signup and view all the answers

    Which layer of the heart is the innermost layer?

    <p>Endocardium</p> Signup and view all the answers

    Which layer of the heart is fibroelastic connective tissue with scattered smooth muscle?

    <p>Endocardium</p> Signup and view all the answers

    Which layer of the heart is continuous with tissue of the myocardium?

    <p>Endocardium</p> Signup and view all the answers

    Which layer of the heart is responsible for producing serous fluid?

    <p>Epicardium</p> Signup and view all the answers

    Which layer of the heart is the outermost layer?

    <p>Epicardium</p> Signup and view all the answers

    Which type of vessel carries blood back to the heart?

    <p>Veins</p> Signup and view all the answers

    Which layer of a large vein tends to be thicker than the tunica media?

    <p>Tunica adventitia</p> Signup and view all the answers

    What is the role of valves in large veins?

    <p>To prevent backflow of blood</p> Signup and view all the answers

    Which type of vessel collects interstitial fluid and returns it to the blood?

    <p>Lymphatic vessels</p> Signup and view all the answers

    What is the main function of elastic arteries?

    <p>To conduct blood from the heart and help move blood forward under steady pressure</p> Signup and view all the answers

    Which type of vessel has the thickest tunica adventitia?

    <p>Veins</p> Signup and view all the answers

    What is the major determinant of systemic blood pressure in capillaries?

    <p>Elastic recoil</p> Signup and view all the answers

    Which type of vessel has the thinnest walls?

    <p>Capillaries</p> Signup and view all the answers

    What is the main function of muscular arteries?

    <p>To resist and control blood flow to capillaries</p> Signup and view all the answers

    Which type of vessel has the most distinct layers of smooth muscle?

    <p>Arteries</p> Signup and view all the answers

    Which layer of the pericardium is the outer layer, fibrous sac with serous lining?

    <p>Parietal layer</p> Signup and view all the answers

    What is the function of the cardiac skeleton?

    <p>All of the above</p> Signup and view all the answers

    What is the function of the heart valves?

    <p>Prevent backflow of blood</p> Signup and view all the answers

    What is the function of the endothelium in blood vessels?

    <p>Monitors molecule exchange</p> Signup and view all the answers

    What is the function of the vaso vasorum in blood vessels?

    <p>Brings oxygen and nutrients to cells too far from the lumen</p> Signup and view all the answers

    What is the main function of large/elastic arteries?

    <p>Regulate blood pressure</p> Signup and view all the answers

    What is the main function of medium/muscular arteries?

    <p>Distribute blood to organs</p> Signup and view all the answers

    What is the main function of small arteries/arterioles?

    <p>Regulate blood pressure</p> Signup and view all the answers

    What is the main function of capillaries?

    <p>Exchange between blood and interstitial fluid</p> Signup and view all the answers

    What is the function of venules?

    <p>Carry deoxygenated blood</p> Signup and view all the answers

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