Thoracic Wall and Respiration Mechanism Quiz
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Questions and Answers

Which structure forms the lower boundary of the thorax on each side?

  • Sternum
  • Costal margin (correct)
  • Diaphragm
  • Suprapleural membranes
  • Where is the subcostal angle situated?

  • Between the sternal attachments of the 2nd and 3rd costal cartilage
  • At the superior end of the sternum
  • Between the sternal attachments of the 7th and 8th costal cartilage (correct)
  • At the inferior end of the sternum
  • What forms the floor of the thorax?

  • Costal margin
  • Suprapleural membranes
  • Sternum
  • Diaphragm (correct)
  • What forms the roof of the thorax?

    <p>Suprapleural membranes</p> Signup and view all the answers

    Where is the first prominent thoracic spine felt?

    <p>At the lower end of nuchal furrow</p> Signup and view all the answers

    Where do the anterior intercostal arteries originate from?

    <p>Internal thoracic artery</p> Signup and view all the answers

    How many anterior intercostal arteries are there on each side of the body?

    <p>9</p> Signup and view all the answers

    What do the anterior intercostal arteries supply?

    <p>Intercostal muscles and pectoral muscles</p> Signup and view all the answers

    Which artery is responsible for supplying the upper five or six anterior intercostal arteries?

    <p>Internal thoracic artery</p> Signup and view all the answers

    1

    <p>Supreme intercostal artery and thoracic aorta</p> Signup and view all the answers

    Study Notes

    Boundaries of the Thorax

    • The lower boundary of the thorax on each side is formed by the costal margin.

    Thoracic Angle

    • The subcostal angle is situated at the junction of the 7th and 8th ribs.

    Floor and Roof of the Thorax

    • The floor of the thorax is formed by the diaphragm.
    • The roof of the thorax is formed by the thoracic inlet.

    Thoracic Spine

    • The first prominent thoracic spine is felt at the 7th cervical vertebra.

    Anterior Intercostal Arteries

    • The anterior intercostal arteries originate from the internal thoracic artery.
    • There are 9 anterior intercostal arteries on each side of the body.
    • The anterior intercostal arteries supply the anterior thoracic wall.
    • The internal thoracic artery is responsible for supplying the upper five or six anterior intercostal arteries.

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    Description

    Test your knowledge on the anatomy and function of the thoracic wall and the mechanism of respiration with this quiz. Explore the surface landmarks of the thorax and understand the importance of thoracic viscera in health and disease.

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