Thoracic Cavity

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1. What is pericardium?

  • A layer of membrane surrounding the pericardial cavity
  • The fluid surrounding the heart
  • A layer of membrane surrounding the heart which acts as a lubricant to allow the heart to beat freely
  • A protective layer around the heart
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2. What structure is found at the dorsal boundary to the thoracic cavity?

  • Diaphragm
  • Spine
  • Thoracic vertebrae and vertebrae muscles
  • Sternum

3. Define 'Serous membrane'

  • Continuous layer of epithelium
  • A lubricating fluid
  • Thick outer membrane of the cavity
  • Thin layer of epithelium surrounding the cavity

4. What structure is found at the caudal boundary to the thoracic cavity?

  • Thoracic vertebrae
  • Diaphragm
  • Ribs and intercostal muscles
  • Sternum

5. What is the function of serous fluid?

  • Forms the structure to the cavity
  • Acts as a lubricant between the surface of the cavity and the organs inside
  • Protection of the organs inside the cavity
  • Provides nutrients to the organs inside the cavity
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