Head and Neck Embryology Tutorial 6: Germ Cell Layers and Pharyngeal Arches
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Questions and Answers

When does the development of the face in humans begin?

  • Between the 5th and 6th week
  • Between the 3rd and 4th week
  • Between the 4th and 5th week
  • Between the 4th and 6th week (correct)
  • Which layer is the innermost in basic embryonic development?

  • Endoderm (correct)
  • Exoderm
  • Mesoderm
  • Ectoderm
  • How many pairs of pharyngeal pouches are there in total?

  • Three
  • Five (correct)
  • Four
  • Six
  • Which pharyngeal cleft gives rise to a permanent structure in the adult?

    <p>1st cleft</p> Signup and view all the answers

    At what week is palate development completed?

    <p>12th week</p> Signup and view all the answers

    What is the role of the 2nd pharyngeal arch related to the pharyngeal clefts?

    <p>Obliterates the clefts</p> Signup and view all the answers

    At what week of gestation does tongue development begin?

    <p>4th week</p> Signup and view all the answers

    Which pharyngeal arches are involved in forming the mucosa of the tongue?

    <p>1-4</p> Signup and view all the answers

    What process releases the tongue from being tethered to the floor of the oral cavity?

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

    Which cranial nerves arise from the hindbrain except for the olfactory and optic nerves?

    <p>Cranial nerves 5, 7, and 8</p> Signup and view all the answers

    Where do the sensory ganglia of cranial nerves originate from?

    <p>Ectodermal placodes</p> Signup and view all the answers

    What structures fuse to form the secondary palate?

    <p>Palatal shelves with each other and nasal septum</p> Signup and view all the answers

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