Thyroid gland, light micrograph
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Thyroid gland, light micrograph
Thyroid gland. Coloured light micrograph of a thyroid gland showing the follicles. The follicles are lined by a single layer of cuboidal epithelial cells (red, 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 (yellow), 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. Magnification: x800 when printed 10cm wide
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6452859
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Colloid Cross Section Endocrinology False Colour Follicle Follicles Gland Histological Histology Hormonal Hormones Secretion Slice Storage Thyroid Thyroid Gland Thyroxine Transverse Yellow False Coloured Light Micrograph Light Microscope Section
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