Embryology: Tracheo-Esophageal Fistulas Quiz
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Questions and Answers

What is the role of the septum transversum in the development of the diaphragm?

  • It forms the trachea
  • It assists in breastfeeding
  • It separates the thoracic and abdominal cavities (correct)
  • It prevents regurgitation after feeding
  • What structures are involved in forming the septum that separates the trachea from the esophagus?

  • Endoderm and mesoderm (correct)
  • Ectoderm and dermis
  • Endoderm and ectoderm
  • Mesoderm and ectoderm
  • What anomalies can arise if there are malformations in the tracheoesophageal septum?

  • Clubfoot
  • Tracheoesophageal fistulas (correct)
  • Cleft lip
  • Polydactyly
  • Which condition is likely to manifest due to defects in the mesoderm layer during development?

    <p>VACTERL syndrome</p> Signup and view all the answers

    How does a connection between the esophagus and trachea manifest when the septum doesn't completely form?

    <p>Regurgitation after feeding</p> Signup and view all the answers

    What role does surfactant play in aiding respiration?

    <p>Decreases surface tension in fluids</p> Signup and view all the answers

    During which period do primitive alveoli mature?

    <p>Alveolar period</p> Signup and view all the answers

    What do type II pneumocytes secrete during the terminal sac stage?

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

    What is a possible consequence of insufficient surfactant in premature babies?

    <p>Increased risk of breathing problems</p> Signup and view all the answers

    Which drug administered to mothers during early labor stimulates lung maturation and surfactant secretion in premature babies?

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

    Where does the development of the respiratory tract begin in an embryo?

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

    What structures give rise to the larynx during embryonic development?

    <p>Pharyngeal arches IV and V</p> Signup and view all the answers

    Which membrane is found at the cranial end of the foregut during embryonic development?

    <p>Oropharyngeal membrane</p> Signup and view all the answers

    From which structure does the lower respiratory system develop in an embryo?

    <p>Respiratory diverticulum</p> Signup and view all the answers

    What causes the embryo to develop its C shape through foldings?

    <p>Cranio-caudal foldings</p> Signup and view all the answers

    What is the origin of the phrenic nerves that innervate the diaphragm?

    <p>Anterior horn of C3-C5</p> Signup and view all the answers

    At what level does the septum transversum appear during the 4th week of development?

    <p>C1</p> Signup and view all the answers

    Why is the diaphragm innervated by nerves from cervical levels even though it's found at thoracic level?

    <p>The diaphragm moves from front to back, carrying the nerves with it</p> Signup and view all the answers

    What is the final result of the partial separation between thoracic and abdominal cavities by the diaphragm?

    <p>Two pericardioperitoneal canals are left</p> Signup and view all the answers

    Why does the septum transversum change position as the baby grows?

    <p>It starts at cervical level and moves down to thoracic cavity</p> Signup and view all the answers

    What separates the pericardial cavity from the pleural cavities during embryonic development?

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

    How are the lungs positioned in relation to the pleural cavities during development?

    <p>Lungs are surrounded by the pleural cavities</p> Signup and view all the answers

    What happens to the size of the pleural cavities as the lungs expand during development?

    <p>They shrink in size</p> Signup and view all the answers

    Which structures penetrate the lobes of the left lung during development?

    <p>Primary bronchi</p> Signup and view all the answers

    What contributes to delimiting the space into which the lungs expand during development?

    <p>Pleuropericardial membrane</p> Signup and view all the answers

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