Structure and Development
They are simple cuboidal epithelium and are arranged in spherical follicles surrounding colloid. The interiors of one of these follicles is known as the follicular lumen.
They have thyrotropin receptors on their surface, which respond to thyroid-stimulating hormone.
Embryologic origin is from a median endodermal mass in the region of the tongue (foramen cecum) in contrast to the parafollicular (C) cells that arise from the 4th branchial pouch.
Read more about this topic: Follicular Cell
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