Formation of Lung Buds in Embryos
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Questions and Answers

From which embryonic layer does the epithelium of the internal lining of the larynx, trachea, bronchi, and lungs originate?

  • Visceral mesoderm
  • Ectoderm
  • Endoderm (correct)
  • Mesoderm
  • What factor induces the formation of the lung bud during embryonic development?

  • Tracheoesophageal septum
  • Visceral (splanchnic) mesoderm
  • TBX4 (correct)
  • Retinoic acid (RA)
  • Which embryonic layer gives rise to the cartilaginous, muscular, and connective tissue components of the trachea and lungs?

  • Endoderm
  • Ectoderm
  • Visceral mesoderm (correct)
  • Mesoderm
  • What separates the lung bud from the foregut as it expands caudally during development?

    <p>Tracheoesophageal ridges</p> Signup and view all the answers

    Where does the internal lining of the larynx originate from in embryonic development?

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

    Which cranial nerve innervates all laryngeal muscles?

    <p>Tenth cranial nerve</p> Signup and view all the answers

    How do the primary bronchi form?

    <p>By enlarging from lung buds</p> Signup and view all the answers

    What structures differentiate into the false and true vocal cords?

    <p>Folds of tissue</p> Signup and view all the answers

    At about what time does the laryngeal epithelium proliferate rapidly?

    <p>During the formation of cartilages</p> Signup and view all the answers

    What do pericardioperitoneal canals eventually become during lung development?

    <p>Pleural cavities</p> Signup and view all the answers

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