Multiple choice

The thyroid and parathyroid glands are the derivatives of _______.

  1. pharyngeal pouch

  2. oesophageal pouch

  3. gills

  4. All of the above
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A Correct answer
Explanation

The thyroid and parathyroid glands originate from the pharyngeal pouches during embryonic development. Specifically, the thyroid develops from the floor of the pharynx (foramen cecum), while the parathyroid glands develop from the third and fourth pharyngeal pouches. 'Gills' are respiratory structures in aquatic organisms, and 'oesophageal pouch' is not the correct embryological origin.

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