Multiple choice

The thyroid and parathyroid glands are derivatives of

  1. pharyngeal pouch

  2. oesphageal lining

  3. gills

  4. All of the above
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A Correct answer
Explanation

The thyroid and parathyroid glands develop from the pharyngeal pouches (specifically the 3rd and 4th pharyngeal pouches) during embryonic development. The thyroid arises from the floor of the pharynx (foramen cecum region), while parathyroids develop from the dorsal wings of the 3rd and 4th pouches. 'Oesphageal lining' is misspelled.

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