Thyroid follicles. Light micrograph of a section through a thyroid gland showing the follicles. The follicles are lined by a single layer of cuboidal epithelial cells,which synthesise and secrete the iodine-containing hormones T3 (tri-iodothyronine) and T4 (thyroxine). The thyroid follicle is filled with a glycoprotein substance called thyroglobulin or thyroid colloid (red),which is a storage form of the thyroid hormones. When actively secreting hormones the lining cells are large and cuboidal,when less active the follicles are distended and the secretory cells flattened | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Collection CNRI / Overseas |
Bildgröße: | 5062 px × 3453 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |