File:Stage13 and 22 thyroid development a.jpg

From Embryology

Original file(800 × 640 pixels, file size: 94 KB, MIME type: image/jpeg)

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

File history

Click on a date/time to view the file as it appeared at that time.

current07:21, 6 October 2009Thumbnail for version as of 07:21, 6 October 2009800 × 640 (94 KB)S8600021 (talk | contribs)