Breathing and Thorax Functions

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Questions and Answers

What is the primary function of the thorax in relation to breathing?

  • To protect the lungs from damage
  • To act as a conduit for structures between the abdomen and neck
  • To provide movement for air into and out of the lungs (correct)
  • To house and protect the heart

What is the main role of the diaphragm in breathing?

  • To expand the thoracic cavity (correct)
  • To protect the heart and lungs
  • To contract the thoracic cavity
  • To move air into and out of the lungs

Which organs are protected by the thorax?

  • The lungs and liver
  • The kidneys and esophagus
  • The stomach and spleen
  • The heart, lungs, and great vessels (correct)

What is the shape of the diaphragm?

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

Which organs lie under the right dome of the diaphragm?

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

What is the function of the mediastinum?

<p>To act as a conduit for structures between body regions (A)</p> Signup and view all the answers

Which structures pass through the mediastinum?

<p>The esophagus, vagus nerves, and thoracic duct (C)</p> Signup and view all the answers

What is the origin of the phrenic nerves?

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

Where do the posterior aspects of the superior poles of the kidneys lie?

<p>On the diaphragm, anterior to ribs XI and XII on the right, and to ribs XI and XII on the left (D)</p> Signup and view all the answers

What is one of the key elements in breathing?

<p>Up and down movements of the diaphragm (B)</p> Signup and view all the answers

Which abdominal viscera are protected by the thoracic wall?

<p>Stomach, spleen, and liver (A)</p> Signup and view all the answers

What is the purpose of the ribs in breathing?

<p>To change the lateral and anterior dimensions of the thoracic wall (C)</p> Signup and view all the answers

What passes through the mediastinum from the abdomen to the neck?

<p>Esophagus, vagus nerves, and thoracic duct (A)</p> Signup and view all the answers

What is the purpose of the thorax with respect to vital organs?

<p>To house and protect vital organs (C)</p> Signup and view all the answers

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