Thyroid gland. Coloured light micrograph (LM) of a thyroid gland showing the follicles. The follicles are lined by a single layer of cuboidal epithelial cells (purple,dark nuclei),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 (grey),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 / Gaugler, Dr. Gary |
Bildgröße: | 4080 px × 3072 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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