Human Thorax Anatomy and Embryology Quiz
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Questions and Answers

How many pleural cavities are present in the thorax?

  • Four
  • Two (correct)
  • One
  • Three

What is the main function of the thorax?

  • Excretion
  • Digestion
  • Respiration (correct)
  • Circulation

What structures does the thoracic wall consist of?

  • Lymphatic vessels
  • Endocrine glands
  • Skeletal elements and muscles (correct)
  • Blood vessels and nerves

How many thoracic vertebrae are there posteriorly?

<p>12 (A)</p> Signup and view all the answers

What is the superior thoracic aperture formed by?

<p>T1, medial margin of rib I, manubrium of the sternum (A)</p> Signup and view all the answers

What forms the inferior thoracic aperture?

<p>Body of T12, rib XII, xiphoid process (B)</p> Signup and view all the answers

Which of the following is part of the thoracic wall's skeletal framework?

<p>Sternum (D)</p> Signup and view all the answers

How many sites for articulations with ribs are there in the thoracic wall?

<p>2 (D)</p> Signup and view all the answers

What is the main function of the thorax in relation to the heart and lungs?

<p>To protect (A)</p> Signup and view all the answers

What is the function of the thorax as a conduit?

<p>For passing air (A)</p> Signup and view all the answers

What is the main role of the thorax in biomechanics?

<p>To facilitate respiration (D)</p> Signup and view all the answers

What is the superior margin of the manubrium in the same horizontal plane as?

<p>The intervertebral disc between TII and TIII (B)</p> Signup and view all the answers

Which muscle is the most powerful and important during inspiration?

<p>Diaphragm (D)</p> Signup and view all the answers

Which ribs articulate directly with the sternum?

<p>True ribs (A)</p> Signup and view all the answers

Which ribs lack an anterior connection with other ribs or with the sternum?

<p>Ribs XI and XII (D)</p> Signup and view all the answers

Which muscle depresses the ribs?

<p>Transversus thoracis muscles (B)</p> Signup and view all the answers

Which joint is not synovial but a fibrocartilaginous joint?

<p>Sternocostal joints (B)</p> Signup and view all the answers

Which muscle participates in the decrease of thoracic dimension during exhalation?

<p>Internal intercostals (B)</p> Signup and view all the answers

Which thoracic vertebrae lacks inferior costal facets and articulates only with its own ribs?

<p>TX (B)</p> Signup and view all the answers

Which muscle is found in each intercostal space and is responsible for expiration?

<p>Internal intercostals (D)</p> Signup and view all the answers

Which muscle is innervated by the phrenic nerve and is attached peripherally to the xiphoid process?

<p>Diaphragm (D)</p> Signup and view all the answers

Which joints provide anchorage to the sternum and contribute to the formation of an inferior costal margin?

<p>Interchondral joints (D)</p> Signup and view all the answers

Which muscles elevate the ribs and reinforce the thoracic wall?

<p>Transversus thoracis muscles (D)</p> Signup and view all the answers

Which muscles increase the dimension of the thorax during inhalation?

<p>Scalenes (A)</p> Signup and view all the answers

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