Thyroid follicles, light micrograph

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Thyroid follicles, light micrograph

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 (purple), 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

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 9241431

© OVERSEAS/COLLECTION CNRI/SPL

Colloid Endocrinology Follicle Follicles Histological Histology Hormonal Hormone Secretion Storage Thyroid Gland Thyroxine Tissue Light Micrograph Light Microscope Section Sectioned

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