Thyroid follicular cell

Thyroid follicular cells (also called thyroid epithelial cells or thyrocytes) are the major cell type in the thyroid gland, and are responsible for the production and secretion of the thyroid hormones thyroxine (T₄) and triiodothyronine (T₃). They form the single layer of cuboidal epithelium that makes up the outer structure of the almost spherical thyroid follicle.