thyroid diverticulum

{{Infobox embryology

| Name = Thyroid diverticulum

| Latin = saccus thyreoideus; diverticulum thyreoideum

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| Precursor = Second pharyngeal arch

| GivesRiseTo = Thyroid follicular cells

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The thyroid pouch or thyroid diverticulum is the embryological structure of the second pharyngeal arch from which thyroid follicular cells derive.{{Cite web|url=http://www.mc.vanderbilt.edu/histology/labmanual2002/labsection3/ThyroidParathyroidIslets03.htm|archiveurl=https://web.archive.org/web/20080314150306/http://www.mc.vanderbilt.edu/histology/labmanual2002/labsection3/ThyroidParathyroidIslets03.htm|title=Endocrine Glands|archivedate=March 14, 2008}}

It grows from the floor of the pharynx.{{Cite web|url=http://www.med.mun.ca/anatomyts/head/thyroid.htm|title=The thyroid gland|access-date=2008-02-14|archive-date=2021-04-15|archive-url=https://web.archive.org/web/20210415023954/http://www.med.mun.ca/anatomyts/head/thyroid.htm|url-status=dead}}