File:Stage13 and 22 thyroid development a.jpg

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Thyroid Gland Embryonic Development

Compilation of cross-sections showing the appearance of the developing thyroid at the beginning of week 5 and at week 8 of embryonic development.

Thyroid Timeline

  • 24 days - thyroid begins as a median endodermal thickening in the floor of pharynx
  • tongue grows - cells descend in neck.
  • thyroglossal duct - proximal end at the foramen caecum of tongue.
  • thyroid diverticulum - hollow then solid, right and left lobes, central isthmus.
  • Week 11 - colloid appearance in thyroid follicles, iodine and thyroid hormone (TH) synthesis


Links: Endocrine - Thyroid Development | Carnegie stage 13 | Carnegie stage 22

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Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan

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