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 (A)</p> Signup and view all the answers

At what week is palate development completed?

<p>12th week (D)</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 (C)</p> Signup and view all the answers

At what week of gestation does tongue development begin?

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

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

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

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

<p>Apoptosis (A)</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 (B)</p> Signup and view all the answers

Where do the sensory ganglia of cranial nerves originate from?

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

What structures fuse to form the secondary palate?

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

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