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4 Written Questions

4 Multiple Choice Questions

  1. -tough connective tissue layer that defines the boundaries of the middle mediastinum
    -cone shaped bag, attached to diaphragm at base, continuous with adventitia of great vessels at apex
  2. -superior vena cava
    -inferior vena cava
    -coronary sinus (returns venous blood from heart itself)
  3. *2 layers
    1. parietal: lines inner surface fibrous pericardium
    2. visceral: adheres to heart and forms its outer coating-->epicardium
    *serous pericardium continuous at the roots of the great vessel
    *everywhere else there is a narrow space between them called the pericardial cavity
  4. *sac surrounding heart and roots of great vessels
    1. fibrous pericardium
    2. Serous pericardium

4 True/False Questions

  1. What are the subdivisions of the inferior mediastinum?1. anterior: area anterior to pericardial sac and posterior to sternum
    2. middle: centrally located in thoracic cavity (contains heart)
    3. Posterior


  2. What separates the 2 main components of the mediastinum?*transverse plane extending back from the sternal angle to the intervertebral disc btw. T4 and T5
    *Separates mediastinum into superior and inferior compartments


  3. What are the pericardial sinuses?*areas of continuity between the parietal and visceral serous pericardium around great vessels, creat reflections of serous pericardium
    1. Transverse pericardial sinus: separates aorta and pulmonary artery from the superior vena cava
    2. oblique pericardial sinus: formed by reflection of serous pericardium onto pulmonary veins


  4. What are the major structures of the middle mediastinum?1. pericardium
    2. heart
    3. origin of great vessels:
    -ascending aorta
    -pulmonary arteries
    -pulmonary veins
    -superior vena cava
    -inferior vena cava
    4. Phrenic nerves


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