Embryonic Development of Head and Neck - Pharyngeal Apparatus
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Questions and Answers

What is the structure that forms on the midline of the embryo during development?

  • Ectoderm
  • Pharyngeal apparatus
  • Notochord (correct)
  • Neural crest cells
  • During which process do cells migrate along the primitive streak?

  • Neural tube formation
  • Notochord formation
  • Gastrulation (correct)
  • Pharyngeal apparatus development
  • What is the early precursor of the central nervous system?

  • Pharyngeal apparatus
  • Ectoderm
  • Neural crest cells (correct)
  • Notochord
  • Which structure invaginates to form the neural tube?

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

    In what week does the embryo transition from a flat organism to a more tubular creature?

    <p>3rd week</p> Signup and view all the answers

    Which process leads to the formation of a three-layered embryo (ectoderm, mesoderm, endoderm)?

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

    What is the origin of the structures derived from the pouches mentioned in the text?

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

    Which gland is derived from the ultimobranchial body mentioned in the text?

    <p>Thyroid gland</p> Signup and view all the answers

    Failure of obliteration of pharyngeal clefts by which pharyngeal arch can lead to branchial cysts?

    <p>2nd pharyngeal arch</p> Signup and view all the answers

    Which part of the face is formed by the single frontonasal prominence?

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

    What plays a crucial role in the development of the face around the stomodeum in the 4th week?

    <p>Neural crest cells</p> Signup and view all the answers

    Where are the primordial swellings primarily derived from during facial formation?

    <p>Neural crest cells</p> Signup and view all the answers

    When does the oronasal membrane typically rupture?

    <p>7th week</p> Signup and view all the answers

    Where are the primitive choanae located after the development of the secondary palate?

    <p>At the junction of nasal cavity and pharynx</p> Signup and view all the answers

    When does palatogenesis begin and end?

    <p>Begins at the end of the 5th week and ends at the end of the 12th week</p> Signup and view all the answers

    From which structure does the primary palate develop?

    <p>Intermaxillary segment</p> Signup and view all the answers

    What is the primary palate fused to during development?

    <p>The secondary palate</p> Signup and view all the answers

    Where does the secondary palate begin to develop from?

    <p>Maxillary arches</p> Signup and view all the answers

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