Anatomy of the Human Heart
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Questions and Answers

Which type of muscle makes up the bulk of the heart?

  • Skeletal muscle
  • Cardiac muscle (correct)
  • Smooth muscle
  • Intercalated muscle
  • What is the function of intercalated discs in cardiac muscle cells?

  • To allow for electrical synchronization (correct)
  • To provide structural support
  • To facilitate nutrient exchange
  • To regulate muscle contraction
  • What is the innermost lining of the muscle wall of the heart called?

  • Myocardium
  • Epicardium
  • Endocardium (correct)
  • Pericardium
  • What type of tissue makes up the lining of the chambers and vessels of the heart?

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

    What structures project outwards from the endocardium and help add force to the contraction of the heart wall?

    <p>Trabeculae carneae</p> Signup and view all the answers

    Which type of vessel carries blood away from the heart?

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

    Which type of vessel carries blood towards the heart?

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

    What are the microscopic vessels that carry blood between arteries and veins called?

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

    What are the large vessels that connect the heart to the rest of the cardiovascular system called?

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

    Which arteries serve the cardiac muscle tissue?

    <p>Coronary arteries</p> Signup and view all the answers

    Which chamber of the heart is located at the apex?

    <p>Left ventricle</p> Signup and view all the answers

    What is the purpose of the pericardial fluid?

    <p>To prevent friction between the heart and outer covering</p> Signup and view all the answers

    Where is the heart located within the thorax?

    <p>Behind the sternum</p> Signup and view all the answers

    What is the size of the average adult heart?

    <p>12cm long, 9cm wide and 6cm deep</p> Signup and view all the answers

    What is the outermost layer of the heart wall called?

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

    Which layer of the pericardium covers the exterior of the heart?

    <p>Fibrous pericardium</p> Signup and view all the answers

    Where is the upper border of the heart located?

    <p>Above the 2nd rib</p> Signup and view all the answers

    Where can the heart be listened to the loudest with a stethoscope?

    <p>At the apex</p> Signup and view all the answers

    What is the purpose of the pericardium?

    <p>To help support the heart in its position within the thorax</p> Signup and view all the answers

    How many layers make up the heart wall within all four chambers?

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

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